pat1
....\1001.c
....\1001.exe
....\1001.o
....\1002.c
....\1002.exe
....\1002.o
....\1003.c
....\1003.exe
....\1003.o
....\1004.c
....\1004.exe
....\1004.o
....\1005.c
....\1005.exe
....\1005.o
....\a.txt