Syntactic uninvert

I. Lvg Command:

shell> lvg -f:S -F:1:2

II. Test Cases:

Angioplasty, Transluminal, Percutaneous Coronary|Percutaneous Coronary Transluminal Angioplasty
Kyphosis, NOS|Kyphosis
Sedative, hypnotic, or anxiolytic amnestic disorder|Sedative, hypnotic, or anxiolytic amnestic disorder
Acid, NOS|Acid
Alzheimer's disease, unspecified|unspecified Alzheimer's disease
Technic, Dental High-Speed|Dental High-Speed Technic
Leukemia, Myeloid, Acute, M4|M4 Acute Myeloid Leukemia
2,6-Dichlorobenzenoneindophenol Dye|2,6-Dichlorobenzenoneindophenol Dye
3-HYDROXY-3-METHYLGLUTARIQUE, ACIDE|ACIDE 3-HYDROXY-3-METHYLGLUTARIQUE
Cyclic AMP, 8-Bromo|8-Bromo Cyclic AMP
ABORT, NAPRAVLIAEMYE NA ABORT|NAPRAVLIAEMYE NA ABORT ABORT
Accidents, Traffic|Traffic Accidents
Acid, NOS|Acid
Activities, Daily Living|Daily Living Activities
Adenomas, Basophil|Basophil Adenomas
Syndrome, Adie|Adie Syndrome
Cortex Disease, Adrenal|Adrenal Cortex Disease
Blocking Agents, beta-Adrenergic|beta-Adrenergic Blocking Agents
MYELOID METAPLASIA, AGNOGENIC|AGNOGENIC MYELOID METAPLASIA
Alcohol, Propyl|Propyl Alcohol
Postinfectional hypotrichosis, NOS|Postinfectional hypotrichosis
Alzheimer's disease, unspecified|unspecified Alzheimer's disease
Acids, Aminobenzoic|Aminobenzoic Acids
Amyloidosis, NOS|Amyloidosis
Anemia, Dyserythropoietic, Congenital|Congenital Dyserythropoietic Anemia
Departments, Hospital Anesthesia|Hospital Anesthesia Departments
Angioplasty, Transluminal, Percutaneous Coronary|Percutaneous Coronary Transluminal Angioplasty
L-Histidine, N-beta-alanyl-3-methyl-|N-beta-alanyl-3-methyl- L-Histidine
Antibiotics, Antineoplastic|Antineoplastic Antibiotics
Antigens, CD4|CD4 Antigens
Drugs, Antiparasitic|Antiparasitic Drugs
Incompetent, aortic valve|aortic valve Incompetent
5-Lipoxygenase, Arachidonic Acid|Arachidonic Acid 5-Lipoxygenase
Malformation, Arteriovenous|Arteriovenous Malformation
Dehydrogenase, Ascorbino|Ascorbino Dehydrogenase
Injuries, Athletic|Athletic Injuries
Disorders, Autistic|Autistic Disorders
1H-Purine, 6-((1-methyl-4-nitro-1H-imidazol-5-yl)thio)-|6-((1-methyl-4-nitro-1H-imidazol-5-yl)thio)- 1H-Purine
Balloons, Ballobes|Ballobes Balloons
Beaver, NOS|Beaver
Distribution, Bernoulli|Bernoulli Distribution
Dyskinesia, biliary|biliary Dyskinesia
Transport, Uphill|Uphill Transport
Diseases, Bladder|Bladder Diseases
SVERTYVANIE KROVI, TESTY|TESTY SVERTYVANIE KROVI
Syndrome, Bloom|Bloom Syndrome
Diseases, Bone Marrow|Bone Marrow Diseases
Leukemia Virus, Bovine|Bovine Leukemia Virus
Fetal Presentations, Breech|Breech Fetal Presentations
Gland, Brunner's|Brunner's Gland
Antipsychotics, Butyrophenone|Butyrophenone Antipsychotics
Sulfate, Lime Anhydrous|Lime Anhydrous Sulfate
Abuse, Cannabis|Cannabis Abuse
Cyanide p-Trifluoromethoxyphenylhydrazone, Carbonyl|Carbonyl Cyanide p-Trifluoromethoxyphenylhydrazone
Carcinoma, Krebs 2|Krebs 2 Carcinoma
[X]Cardiovascular disease, unspecified|unspecified [X]Cardiovascular disease
Proteins, Catabolite Activator|Catabolite Activator Proteins
Monkeys, Capuchin|Capuchin Monkeys
System, Cell-Free|Cell-Free System
Anoxias, Cerebral|Cerebral Anoxias
Ferroxidase, Ceruloplasmin|Ceruloplasmin Ferroxidase
Agents, Chelating|Chelating Agents
Disorder, Child Nutrition|Child Nutrition Disorder
CHOLANGITIS, FIBROSING|FIBROSING CHOLANGITIS
Mole, hydatidiform, invasive|invasive hydatidiform Mole
Substrates, Chromogenic|Chromogenic Substrates
Emmonsia, NOS|Emmonsia
Visit, Clinic|Clinic Visit
COBALT, RADIOISOTOPE|RADIOISOTOPE COBALT
Rectocolitides, Ulcerative|Ulcerative Rectocolitides
Therapies, Combined Modality|Combined Modality Therapies
Enzyme, C5 Cleaving|C5 Cleaving Enzyme
Graphics, Computer|Computer Graphics
Conjunctivitides, Purulent|Purulent Conjunctivitides
Contraceptives, Oral|Oral Contraceptives
Edema, Corneal|Corneal Edema
Radiations, Cosmic|Cosmic Radiations
Period, Critical|Critical Period
Canine tooth, NOS|Canine tooth
Suture, bladder|bladder Suture
Sodium, Dantrolene|Dantrolene Sodium
N,N Diethyltoluamide|N,N Diethyltoluamide
Demyelination, NOS|Demyelination
Technic, Dental High-Speed|Dental High-Speed Technic
ZAHNMEDIZINISCHER DIENST, KRANKENHAUS|KRANKENHAUS ZAHNMEDIZINISCHER DIENST
Deoxyribonucleases, Type II, Site Specific|Site Specific Type II Deoxyribonucleases
Agents, Dermatological|Dermatological Agents
Diet, Diabetic|Diabetic Diet
Technics, Urologic Diagnostic|Urologic Diagnostic Technics
Test, Dichotic Listening|Dichotic Listening Test
Pharyngeal, pouch syndrome|pouch syndrome Pharyngeal
Gel, Prepidil|Prepidil Gel
Twins, Diseases in|Diseases in Twins
Insertion Element, DNA|DNA Insertion Element
Phosphoryl Dolichol, Mannosyl|Mannosyl Phosphoryl Dolichol
Schedule, Drug Administration|Drug Administration Schedule
ARZNEIMITTEL, NICHT VERSCHREIBUNGSPFLICHTIGE|NICHT VERSCHREIBUNGSPFLICHTIGE ARZNEIMITTEL
Colitis, Amoebic|Amoebic Colitis
Transcriptions, Early Gene|Early Gene Transcriptions
Dysplasia, ectodermal|ectodermal Dysplasia
Pharmaceutic Education, Graduate|Graduate Pharmaceutic Education
Therapies, Electroconvulsive|Electroconvulsive Therapies
EMBOLIE, FRUCHTWASSER-|FRUCHTWASSER- EMBOLIE
beta-D-Glucosidase, Emulsion|Emulsion beta-D-Glucosidase
Disease, Hurst|Hurst Disease
FIBROSIS, ENDOMYOCARDIAL|ENDOMYOCARDIAL FIBROSIS
Zonulolysis, Enzymatic|Enzymatic Zonulolysis
Epilepsy seizure, generalized|generalized Epilepsy seizure
Influenza Virus, Equine|Equine Influenza Virus
Volumes, Erythrocyte|Erythrocyte Volumes
Oesophagoplasty, NOS|Oesophagoplasty
ETHYLE, METHANESULFONATE|METHANESULFONATE ETHYLE
Removal, NOS|Removal
Appliance, Extraoral Traction|Extraoral Traction Appliance
PROSTHESIS, EYE, INTERNAL|INTERNAL EYE PROSTHESIS
Factor X deficiency, NOS|Factor X deficiency
Anemia, Fanconi's|Fanconi's Anemia
CALICIVIRUS, FELINES|FELINES CALICIVIRUS
Method, Fertility Pattern|Fertility Pattern Method
Diseases, Breast Fibrocystic|Breast Fibrocystic Diseases
Oils, Fish Liver|Fish Liver Oils
2,4(1H,3H)-Pyrimidinedione, 5-fluoro-|5-fluoro- 2,4(1H,3H)-Pyrimidinedione
Food, poisoning|poisoning Food
FORMIMINOGLUTAMIQUE, ACIDE|ACIDE FORMIMINOGLUTAMIQUE
Ataxy, family|family Ataxy
Excavatum, Pectus|Pectus Excavatum
Ligase, Glutamate-Cysteine|Glutamate-Cysteine Ligase
CARDIOESOPHAGEAL RELAXATION, GASTROESOPHAGEAL REFLUX|GASTROESOPHAGEAL REFLUX CARDIOESOPHAGEAL RELAXATION
Fusions, Gene|Gene Fusions
Genes, gag|gag Genes
Markers, Genetic|Genetic Markers
Cells, Giant|Giant Cells
Glaucoma, Open Angle|Open Angle Glaucoma
Acid, D-Glucaric|D-Glucaric Acid
Acid, Glycocholic|Glycocholic Acid
STRUMA, ENDEMISCHE|ENDEMISCHE STRUMA
GREFFON CONTRE HOTE, REACTION|REACTION GREFFON CONTRE HOTE
Phosphates, Guanosine|Guanosine Phosphates
Hallucination, NOS|Hallucination
Rationing, Health Care|Health Care Rationing
Service, Health Indigenous|Health Indigenous Service
Enlargement, Heart|Heart Enlargement
Transplantations, Heart-Lung|Heart-Lung Transplantations
Test, Hematologic|Hematologic Test
Abnormal haemoglobin, NOS|Abnormal haemoglobin
Comas, Hepatic|Hepatic Comas
Nephrosis, cholemic|cholemic Nephrosis
Blister, Fever|Fever Blister
Ventilation, High Frequency Jet|High Frequency Jet Ventilation
Antigen, Histocompatibility|Histocompatibility Antigen
Seropositivity, HTLV-III|HTLV-III Seropositivity
Bromide, Homidium|Homidium Bromide
Service, Shared Hospital|Shared Hospital Service
I, HSN Type|HSN Type I
Effusion of joint, site unspecified|site unspecified Effusion of joint
Hypercholesterolemia, Familial|Familial Hypercholesterolemia
Allergy, unspecified|unspecified Allergy
Area, Lateral Hypothalamic|Lateral Hypothalamic Area
Testings, Illicit Drug|Illicit Drug Testings
Switch Sequence, Ig|Ig Switch Sequence
Immunosuppressive agent, NOS|Immunosuppressive agent
Nursings, Industrial|Industrial Nursings
PAGET, MALADIE CUTANEE|MALADIE CUTANEE PAGET
INJEKTIONEN, INTRAVENOESE|INTRAVENOESE INJEKTIONEN
Management Team, Institutional|Institutional Management Team
Units, Intensive Care|Intensive Care Units
Gland, Interrenal|Interrenal Gland
Tensions, Ocular|Ocular Tensions
Benzoic acid, 3-(acetylamino)-2,4,6-triiodo-5-((methylamino)carbonyl)-|3-(acetylamino)-2,4,6-triiodo-5-((methylamino)carbonyl)- Benzoic acid
Amaurotic idiocy, late infantile type|late infantile type Amaurotic idiocy
Jugular veins, NOS|Jugular veins
Dehydrogenase, 2-Oxoglutarate|2-Oxoglutarate Dehydrogenase
Nephrosis, Lower Nephron|Lower Nephron Nephrosis
Kyphosis, NOS|Kyphosis
Synthase, Lactose|Lactose Synthase
Virus, Latent Rat|Latent Rat Virus
Legislations, Pharmacy|Pharmacy Legislations
LESCH NYHAN, SYNDROME|SYNDROME LESCH NYHAN
Lymphoid leukemia, NOS|Lymphoid leukemia
Leukemia, Myelocytic, Acute|Acute Myelocytic Leukemia
Leukemia, Myeloid, Acute, M4|M4 Acute Myeloid Leukemia
LEUKAEMIE, T-ZELL-, HTLV-II-ASSOZIIERTE|HTLV-II-ASSOZIIERTE T-ZELL- LEUKAEMIE
Cell-Stimulating Hormone, Interstitial|Interstitial Cell-Stimulating Hormone
9, 12-Octadecadienoic acid|12-Octadecadienoic acid 9
Listeriosis, unspecified|unspecified Listeriosis
Ethanone, 2-(6-(2-hydroxy-2-phenylethyl)-1-methyl-2-piperidinyl)-1-phenyl-, (2R-(2alpha,6alpha(S*)))-|(2R-(2alpha,6alpha(S*)))- 2-(6-(2-hydroxy-2-phenylethyl)-1-methyl-2-piperidinyl)-1-phenyl- Ethanone
LUNGENKRANKHEITEN, MYKOTISCHE|MYKOTISCHE LUNGENKRANKHEITEN
Irradiations, Lymphoid|Lymphoid Irradiations
Malignant lymphoma, non-Hodgkin's type|non-Hodgkin's type Malignant lymphoma
Hole, Macular|Macular Hole
Hyperpyrexias, Malignant|Malignant Hyperpyrexias
Nitrogen Mustard, Mannitol|Mannitol Nitrogen Mustard
Mammectomy, NOS|Mammectomy
Second division, trigeminal nerve|trigeminal nerve Second division
Sciences, Medical Information|Medical Information Sciences
SKIN CANCER, MELANOMA|MELANOMA SKIN CANCER
Meningitides, Meningococcic|Meningococcic Meningitides
Mesenteric artery, NOS|Mesenteric artery
Methemoglobinemia, unspecified|unspecified Methemoglobinemia
BALB C Mouse, Inbred|Inbred BALB C Mouse
Microscopy, Electron|Electron Microscopy
Hydrochloride, Minocycline|Minocycline Hydrochloride
Blood-Group Systems, MNSs|MNSs Blood-Group Systems
beta Lactams, Monocyclic|Monocyclic beta Lactams
Tumor Virus, Mouse|Mouse Tumor Virus
Carboxylase Deficiencies, Combined|Combined Carboxylase Deficiencies
Atrophic, muscle|muscle Atrophic
Fungal poisoning, NOS|Fungal poisoning
Disease, Thomsen|Thomsen Disease
Nannizzia, NOS|Nannizzia
Distribution, Negative Binomial|Negative Binomial Distribution
Neoplasms, Radiation Induced|Radiation Induced Neoplasms
Systems, Nervous|Nervous Systems
Junctions, Neuromuscular|Neuromuscular Junctions
HISTIOCYTOSIS, LIPID|LIPID HISTIOCYTOSIS
Distribution, Nonclinical|Nonclinical Distribution
Nucleic acid, NOS|Nucleic acid
Nursing, Supervisory|Supervisory Nursing
Hypertension, Ocular|Ocular Hypertension
Oncoprotein, NOS|Oncoprotein
Nerve Heads, Optic|Optic Nerve Heads
Mental Disorder, Organic|Organic Mental Disorder
Influenza Virus, Swine|Swine Influenza Virus
Syndrome, Acro-Osteolysis|Acro-Osteolysis Syndrome
Function Tests, Ovarian|Ovarian Function Tests
Pacemaker, cardiac|cardiac Pacemaker
PANCREAS, MALADIES|MALADIES PANCREAS
Paraffin, NOS|Paraffin
System, Parasympathetic Nervous|Parasympathetic Nervous System
PTT, activated|activated PTT
Recognitions, Visual Pattern|Visual Pattern Recognitions
Neoplasm, Penile|Penile Neoplasm
Performances, Perceptual Motor|Perceptual Motor Performances
Cyst, periodontal|periodontal Cyst
Buffer Zones, Body|Body Buffer Zones
Carbinol, Benzyl|Benzyl Carbinol
Phosphoglycerides, Ethanolamine|Ethanolamine Phosphoglycerides
Medicine, Physical|Physical Medicine
Bodies, Pineal|Pineal Bodies
VEGETAUX, PROTEINES|PROTEINES VEGETAUX
Pleurodynia, Epidemic|Epidemic Pleurodynia
PHYTOLACCA AMERICANA, MITOGENE|MITOGENE PHYTOLACCA AMERICANA
Depolymerase, Pectin|Pectin Depolymerase
Specialists, Population Program|Population Program Specialists
Ulcer, Postphlebitic|Postphlebitic Ulcer
Pregnancy Complications, Cardiovascular|Cardiovascular Pregnancy Complications
Protein, SP1 Pregnancy|SP1 Pregnancy Protein
Thrombocytopenic, primary|primary Thrombocytopenic
PROGESTERONE, GLOBULINE FIXATRICE|GLOBULINE FIXATRICE PROGESTERONE
Model, Proportional Hazards|Proportional Hazards Model
Protein binding capacity, NOS|Protein binding capacity
Pruritus, ani|ani Pruritus
PSYCHOLOGIE, EXPERIMENTELLE|EXPERIMENTELLE PSYCHOLOGIE
Poll, Public Opinion|Public Opinion Poll
Degeneration, pulp|pulp Degeneration
Dimers, Pyrimidine|Pyrimidine Dimers
Radial nerve, NOS|Radial nerve
Assay, Radioimmune Precipitin|Radioimmune Precipitin Assay
Rat, NOS|Rat
Testing, Reality|Reality Testing
Receptors, Gonadoliberin|Gonadoliberin Receptors
Activation Antigens, VLA|VLA Activation Antigens
Disorder of refraction, NOS|Disorder of refraction
Blood Flow, Renal|Renal Blood Flow
Circulation, Respiratory|Respiratory Circulation
Systems, Reticuloendothelial|Reticuloendothelial Systems
RNA tumour virus group, NOS|RNA tumour virus group
LACTOFLAVINE, CARENCE|CARENCE LACTOFLAVINE
RNA, Fungal|Fungal RNA
20-1724, Ro|Ro 20-1724
Iodide, S-Butyrylthiocholine|S-Butyrylthiocholine Iodide
(Sar1,Val5,Ala8)Angiotensin II|(Sar1,Val5,Ala8)Angiotensin II
Hematuria, endemic|endemic Hematuria
Scleroderma, Localized|Localized Scleroderma
Sedative, hypnotic, or anxiolytic amnestic disorder|Sedative, hypnotic, or anxiolytic amnestic disorder
[X]Septicemia, unspecified|unspecified [X]Septicemia
Chromosome, Sex|Sex Chromosome
FIBROMVIRUS, KANINCHEN-|KANINCHEN- FIBROMVIRUS
Group Virus, Simbu|Simbu Group Virus
Disease, Metabolic Skin|Metabolic Skin Disease
Control, Formal Social|Formal Social Control
Soda, Caustic|Caustic Soda
Localization, Sound|Sound Localization
Therapy, speech|speech Therapy
Neoplasm, Spinal|Spinal Neoplasm
SPOREN, BAKTERIEN-|BAKTERIEN- SPOREN
MEDITSINA, GOSUDARSTVENNYI SEKTOR|GOSUDARSTVENNYI SEKTOR MEDITSINA
Diverticulosis, Gastric|Gastric Diverticulosis
Infections, Equine Strongyle|Equine Strongyle Infections
Subdural haemorrhage, NOS|Subdural haemorrhage
Suicide, Attempted|Attempted Suicide
T Cells, Suppressor Effector|Suppressor Effector T Cells
Surgery, Veterinary|Veterinary Surgery
Membranes, Synaptic|Synaptic Membranes
Tachycardia, Sinoatrial Nodal Reentry|Sinoatrial Nodal Reentry Tachycardia
Technology, High-Cost|High-Cost Technology
Region, Terminator|Terminator Region
OVARY, THECA CELL TUMOR|THECA CELL TUMOR OVARY
Thoracic vertebra, NOS|Thoracic vertebra
Agents, Antithyroid|Antithyroid Agents
Assay, Time-Resolved Immunofluorometric|Time-Resolved Immunofluorometric Assay
Scanners, Computed Axial Tomography|Computed Axial Tomography Scanners
Reimplantations, Tooth|Tooth Reimplantations
Fistula, esophagotracheal|esophagotracheal Fistula
Grafting procedure, NOS|Grafting procedure
Vulvovaginitis, trichomonal|trichomonal Vulvovaginitis
Mutase, Triosephosphate|Triosephosphate Mutase
Reanastomoses, Tubal|Tubal Reanastomoses
Sclerosis, Tuberous|Tuberous Sclerosis
Typhus, abdominal|abdominal Typhus
SSHA, AGENTSTVO PO OKHRANE OKRUZHAIUSHCHEI SREDY|AGENTSTVO PO OKHRANE OKRUZHAIUSHCHEI SREDY SSHA
Catheterization, Urethral|Urethral Catheterization
System, Urogenital|Urogenital System
IMMUNIZATION, ACTIVE; MEASLES VIRUS VACCINE, LIVE, ATTENUATED|ATTENUATED LIVE ACTIVE; MEASLES VIRUS VACCINE IMMUNIZATION
Acid, Vanillic|Vanillic Acid
Veillonella, NOS|Veillonella
Exanthema, Swine Vesicular|Swine Vesicular Exanthema
[X]Viral infection,unspecified|[X]Viral infection,unspecified
Duct, Omphalomesenteric|Omphalomesenteric Duct
WASSERVERSCHMUTZUNG, CHEMISCHE|CHEMISCHE WASSERVERSCHMUTZUNG
RADIOAKTIVNOST' ORGANIZMA, IZMERENIIA|IZMERENIIA RADIOAKTIVNOST' ORGANIZMA
Injury, wrist|wrist Injury
Fever, yellow, sylvatic|sylvatic yellow Fever
1 beta-ribofuranosyl-4-(methylmercapto)pyrazolo(3,4-d)pyrimidine|1 beta-ribofuranosyl-4-(methylmercapto)pyrazolo(3,4-d)pyrimidine
1,2-DIMETILIDRAZINA|1,2-DIMETILIDRAZINA
1,4-bis(2,3-epoxypropoxy)butane|1,4-bis(2,3-epoxypropoxy)butane
S-adenosylmethionine methylthioadenosine-lyase (alpha, gamma-eliminating)|gamma-eliminating) S-adenosylmethionine methylthioadenosine-lyase (alpha
Thromboxa-5,13-dien-1-oic acid, 9,15-dihydroxy-11-oxo-, (5Z,9alpha,13E,15S)-|(5Z,9alpha,13E,15S)- 9,15-dihydroxy-11-oxo- Thromboxa-5,13-dien-1-oic acid
17-hydroxy-17-methyl-3-oxospiro(androst-5-ene-4,1'-cyclopropane)-2-carbonitrile|17-hydroxy-17-methyl-3-oxospiro(androst-5-ene-4,1'-cyclopropane)-2-carbonitrile
2,2'-biphenol|2,2'-biphenol
2,3-dinor-6,15-diketo-PGF1alpha|2,3-dinor-6,15-diketo-PGF1alpha
2,4-dinitrophenyl-IgG|2,4-dinitrophenyl-IgG