fixed problem when scan a folder with multiple files that have the same name except the extensions

data/samples/Mathgen/INDEX-mathgen0.pdf_part0.txt.txt

+	1
+FUNCTION	1
+DU	1
+DW	2
+GAUS	1
+GROUND	1
+MAJOR	5
+UZBEKISTANI	1
+MARKOV	2
+DN	2
+MONOID	3
+DP	1
+DE	4
+DD	1
+SMOOTHNESS	1
+DG	1
+DF	5
+DH	2
+DK	1
+DJ	1
+CONSTRUC	1
+BITRARY	1
+FUTURE	4
+CZECH	1
+LINEAR	6
+ARE	16
+EW	1
+HARRISS	1
+INVERTIBLE	1
+EV	1
+POTENTIAL	3
+FUNCTIONALS	1
+EY	1
+EZ	1
+GER	1
+HERMITE	1
+EQ	1
+TRIVIAL	2
+SHOW	1
+EXTRINSIC	5
+DEPENDENT	4
+GC	1
+D	25
+E	34
+F	23
+G	24
+A	112
+B	25
+C	22
+L	25
+M	22
+N	31
+O	17
+H	17
+FV	1
+I	45
+ADVANCED	2
+J	28
+K	15
+ELLIPTIC	8
+U	25
+FEBRUARY	3
+APPLICATIONS	2
+T	19
+W	13
+KNOWN	18
+V	21
+Q	18
+P	25
+WEYL	2
+S	29
+CENTRAL	4
+THUS	9
+R	30
+FP	1
+RECENT	10
+ING	2
+INF	2
+FM	1
+GROUPS	3
+IRREDUCIBLE	9
+Y	18
+X	17
+Z	20
+EMPTY	7
+GROUP	6
+ARROWS	3
+ISOMETRIC	4
+ISOMORPHIC	3
+HA	1
+UNCONDITIONALLY	5
+UGAN	1
+ELEMENTARY	3
+MEASURABLE	6
+MOREOVER	13
+RIEMANN	13
+AUTHORS	8
+GR	1
+COUNTABILITY	2
+CANTOR	3
+ARTICLE	3
+GH	1
+ALGEBRAS	2
+APPLY	4
+TRIANGLES	2
+MICROLOCAL	1
+EXAMINE	2
+COMPACT	3
+MINIMALITY	1
+SIFICATION	1
+CALCULUS	1
+SYSTEMS	3
+AT	1
+AS	12
+AR	2
+CONSTRUCTION	1
+AW	1
+GEOMETRY	3
+AZ	1
+ABEL	2
+WAS	18
+DEFINITION	11
+AD	1
+COURSE	13
+VOLTERRA	1
+IALLY	1
+FUNCTORS	3
+GOAL	4
+DESCRIPTIVE	1
+CLEARLY	13
+AN	39
+ELLIPTICITY	1
+BY	33
+CONSIDER	7
+HYPOTHESIS	11
+COMPLETE	3
+WOULD	4
+BZ	1
+INTEREST	7
+INJECTIVITY	2
+RIGHT	18
+STUDENT	5
+SURJECTIVE	5
+BD	1
+BE	34
+EQUIPPED	9
+ORDERED	5
+JANUARY	2
+LINE	2
+BJ	2
+SCALARS	3
+BM	1
+SPLITTING	3
+CV	1
+CIVITAFROBENIUS	1
+DA	1
+ARROW	4
+PAPER	1
+ODROMY	1
+PROBABILITY	1
+CQ	1
+COMMUTATIVE	10
+LONG	6
+SMOOTHLY	6
+CR	2
+CO	22
+POISSON	1
+COMBINATORICS	4
+LIMA	1
+QGC	1
+SEPTEMBER	2
+BROUWER	1
+LO	1
+PLANES	5
+COMPACTNESS	1
+LM	1
+LL	1
+TECHNIQUES	6
+EQUATIONS	2
+COUNTABLE	3
+LQ	1
+WANG	1
+MH	1
+ADMISSIBLE	6
+KOLMOGOROV	4
+SOLVABLE	7
+MJ	1
+COUNTABLY	7
+MARCH	3
+LITTLE	1
+NESS	1
+YET	3
+RUSSELLKRONECKER	1
+SMALE	1
+GREATER	4
+MZ	1
+CHARACTERIZATION	3
+PATH	1
+EPIR	1
+YGI	1
+SURVEY	2
+PRESS	7
+NI	1
+GIVEN	14
+NM	1
+CARTAN	2
+NUMBERS	2
+HULLS	1
+DIRICHLET	2
+CONTRA	22
+OBVIOUSLY	14
+HADAMARD	1
+FERMAT	1
+NP	1
+ORTHOGONAL	4
+ONTO	6
+EVERY	45
+ON	42
+FOLLOW	1
+CATEGORY	4
+CHERNS	1
+OK	1
+OH	1
+PERELMAN	2
+OF	141
+OB	1
+COULD	7
+TOPOI	1
+ALMOST	15
+TRANSACTIONS	2
+MARTINEZS	1
+MARTIN	3
+TEREST	1
+MALAWIAN	1
+ESSENTIALLY	8
+MEA	1
+INTRINSIC	7
+RECENTLY	5
+PI	20
+CHEBYSHEVKLEIN	1
+TOPOS	2
+DOMINATED	2
+RIEMANNIAN	5
+HK	1
+CAL	1
+UNIVERSALLY	7
+DISCRETELY	9
+POINTS	3
+MAY	11
+MAX	1
+MECHANICS	4
+ABSTRACT	3
+BOOLE	1
+GROTHENDIECKS	1
+MINKOWSKIS	1
+PARTIALLY	4
+MARUYAMA	1
+LAGRANGES	2
+IH	1
+CONTEXT	12
+CAN	16
+GALILEOS	1
+IF	125
+UNCOUNTABLE	2
+II	1
+IM	1
+IN	85
+SULTS	1
+MULTIPLY	3
+IQ	1
+REFERENCES	1
+IS	229
+IT	42
+NATURALLY	6
+IU	1
+EQUAL	1
+LYTICALLY	1
+NEXT	9
+MAXRNU	1
+BIRKHAUSER	2
+NORMAL	4
+ANDERSON	2
+MONODROMIES	1
+WITH	10
+CCH	1
+HILBERT	1
+CONSTRUCTIVE	2
+JY	1
+CAUCHYS	1
+DOES	3
+JU	1
+UPON	1
+WEIERSTRASS	2
+SHASTRI	1
+POINCARES	1
+LIES	2
+CONVERSE	2
+KI	1
+WISH	2
+WISE	1
+VECTORS	4
+DOMAIN	3
+PAIRWISE	3
+WILSON	4
+PROPOSITION	4
+QUESTION	5
+ADIC	7
+ADDRESS	12
+KW	1
+CEEDINGS	1
+KY	1
+MOORE	2
+SUBGROUP	3
+WHO	3
+LI	2
+CATEGORIES	2
+SOCIETY	14
+ITIVE	1
+VR	1
+MARTINEZ	2
+CARTANHADAMARD	1
+MON	3
+CAUCHY	1
+GREEN	2
+VK	1
+SPRINGER	2
+LOCALITY	2
+BULLETIN	2
+HOMEOMORPHISM	3
+SUBGROUPS	3
+CONWAY	2
+UY	1
+HOMOMORPHISMS	2
+UR	1
+RAG	1
+US	8
+INJECTIVE	7
+TANH	3
+HOMOLOGICAL	1
+ALGEBRAICALLY	6
+UK	1
+MENIAN	1
+PATHS	2
+CHARACTERIZING	1
+BEGIN	2
+ARITHMETIC	2
+BOUNDED	6
+INTERESTING	4
+LEBESGUES	1
+HERE	2
+TV	1
+CAYLEY	3
+FUR	1
+XJ	1
+KEPLER	1
+DIFFEOMORPHIC	2
+TORRICELLIS	2
+ISOMETRIES	2
+XM	1
+NUMBER	3
+XE	2
+WZ	1
+WY	1
+RESULTS	9
+WX	1
+CONJECTURE	20
+SYLVESTER	1
+LEBESGUE	1
+WEIL	1
+REAL	2
+KDN	1
+REGULAR	3
+WU	3
+PLAN	4
+EUCLID	2
+OUR	1
+POSITIVITY	2
+FURTHER	4
+TICALLY	1
+DECEMBER	3
+MINKOWSKI	2
+WE	46
+SERVE	1
+TAYLOR	5
+ISSUE	3
+RE	1
+THE	156
+APPLICATION	1
+JOURNAL	20
+RING	5
+PROBLEMS	1
+RANDOM	3
+NOETHER	2
+EXTEND	3
+HAND	12
+TORRICELLI	2
+EXTENDING	1
+DESIRED	1
+BOOLES	1
+PT	1
+PU	1
+CHARACTERISTIC	6
+HILL	1
+PQ	1
+TIC	1
+STANDARD	7
+MOIVRE	3
+ASSUMPTION	5
+STEINERS	1
+COMPUTED	1
+MORPHISM	5
+TO	67
+MONOIDS	4
+TN	1
+TS	1
+ST	1
+SY	2
+WELL	12
+SZ	1
+MIN	2
+DID	3
+KUMMER	4
+GERMAINLIE	1
+GRUYTER	1
+AUSTRIAN	1
+DELIGNE	1
+ZHENG	2
+SL	1
+TUNISIAN	1
+MODULUS	4
+ISOMORPHISM	1
+COMPARABLE	2
+SO	9
+SQ	1
+ARCHIMEDES	3
+HEAVISIDE	1
+UNIVERSITY	6
+FIRST	4
+CONTRAVARIANT	4
+SETS	6
+TONS	1
+CASE	4
+ONE	17
+COSH	3
+PROOF	9
+BEEN	11
+TRIANGLE	4
+AWARE	5
+QIAN	1
+ANALYTICALLY	4
+GODELS	1
+DALEMBERT	2
+COMPACTLY	4
+SYMMETRIC	2
+SASAKI	1
+TRANSFINITE	1
+TROPICAL	2
+IMPROVED	1
+DESCARTES	1
+SHED	7
+UNIQUE	6
+SUBALGEBRAS	1
+APPLIES	13
+FINITE	8
+TATE	2
+READER	1
+INTRODUCTION	1
+BERNOULLI	1
+EASY	12
+ARTINIAN	4
+THERE	32
+MEROMORPHIC	4
+STRAIGHTFORWARD	1
+HOMEOMORPHISMS	1
+DAVIS	1
+REVERSIBLE	3
+TION	2
+YEMENI	1
+MEASURE	3
+PONCELETS	1
+CONCLUSION	1
+VIETNAMESE	1
+CLASS	1
+DEFINITE	3
+ZH	1
+ORY	3
+MILNOR	1
+ZMPI	1
+FOR	9
+ZQ	1
+HYPOTH	1
+ZJ	1
+AND	101
+TIVE	1
+ANA	1
+DEGENERACY	1
+ZT	1
+VYV	1
+UNDER	7
+SETTING	3
+GUIDE	2
+MATRI	1
+PRESENT	4
+YC	1
+HAVE	9
+NEGA	1
+MORPHIC	1
+LIOUVILLES	1
+ARBITRARY	7
+YV	1
+CONTROLLED	3
+PARTIAL	5
+HYPERBOLIC	8
+USEFUL	2
+OTHER	12
+GALOIS	6
+API	1
+VANCE	1
+EQUIVALENT	7
+FACTORS	2
+CLASSIFICATION	2
+CHEBYSHEV	1
+JOHNSON	3
+HPI	1
+SURELY	8
+MATRICES	2
+DRL	1
+BEGINNERS	2
+ANT	1
+VARIABLES	2
+HOLDS	12
+IDEA	2
+HIGHLY	1
+ABSOLUTE	1
+MCGRAW	1
+ASKED	3
+OXFORD	3
+CONVEXITY	3
+INDUCTION	1
+IDEALS	1
+TANGENTIAL	6
+FUNCTIONS	3
+SINCE	3
+GRAPH	5
+PROCEED	1
+COMPLEX	6
+RELEVANT	1
+SINH	5
+SMITH	3
+CLEAR	1
+CLIF	1
+ROMANIAN	1
+ARGENTINE	2
+SUPPOSE	17
+INVARIANCE	2
+ELEMENT	2
+UNFORTUNATELY	5
+STOCHASTIC	7
+KUMAR	3
+SERRES	2
+HYPER	8
+PHILIPPINE	1
+IMPLIES	1
+NOVEMBER	5
+CANNOT	5
+STOCHAS	2
+ULTRA	11
+ANTI	20
+MANN	1
+STOCHASTICALLY	3
+GALILEO	2
+WHITE	2
+GENERAL	4
+CONNECTEDNESS	1
+MINIMAL	3
+POLYTOPE	2
+QUESTIONS	6
+DESARGUES	1
+LARGER	5
+CLOSED	7
+JORDAN	5
+SHOWN	5
+CAVALIERI	1
+JONES	3
+SUBJECT	2
+MOBIUS	3
+PROPERTIES	2
+CANONICALLY	8
+POINT	4
+EINSTEINS	1
+SUBALGEBRA	3
+SUB	15
+MONGE	2
+LEIBNIZ	1
+SUP	1
+REDUCIBILITY	1
+SUN	2
+KLEIN	1
+DERIVATION	3
+CONNECTED	3
+LEFT	12
+ESIS	1
+ARGUMENT	3
+KOLMOGOROVS	1
+EMBEDDED	9
+ASSOCIATIVE	5
+SELBERG	2