.
./files.txt
./RA-QD02-0042-01_03.pdf
./reports
./reports/PE_Noguchi
./reports/PE_Noguchi/PE_Noguchi-RA-QD02-0042-01_03_TNo.pdf
./reports/PE_Noguchi/PE_Noguchi-RA-QD02-0042-01_03_TNo.txt
./sample.txt
./tree.txt