.
./files.txt
./RA-QD02-0180-01_03.pdf
./reports
./reports/CAT3_Uesugi
./reports/CAT3_Uesugi/CAT3_Uesugi-RA-QD02-0180-01_03_MU.pdf
./reports/CAT3_Uesugi/CAT3_Uesugi-RA-QD02-0180-01_03_MU.txt
./sample.txt
./tree.txt