c.txt

test file
test file1
test file2
test file4
test file5
this is line one in b.txt file
this is line two in b.txt file
this is line third in b.txt file
this is line fourth in b.txt file
test
test1
test2
test3
test4
test5
test6
ccccc
ddddd
ddddd
eeee
hhh
test1
test2
test3
test4
test5
test6
ccccc
ddddd
ddddd
eeee
hhh
test file4
test file5
this is line one in b.txt file
this is line two in b.txt file
this is line third in b.txt file
this is line fourth in b.txt file
test
test1
test2
test3
test4
test5
test6
ccccc
ddddd
ddddd
eeee
hhh
test1
test2
test3
test4
test5
test6
ccccc
ddddd
ddddd
eeee
hhh