Level 0 . sub
./
sub/
sub/a/
sub/b/
./file1
sub/file2
sub/a/file3
Level 0 sub .
./
sub/
sub/a/
sub/b/
./file1
sub/file2
sub/a/file3
Level 1 . sub
./
./c/
sub/
sub/a/
sub/b/
sub/b/file4
Level 1 sub .
./
./c/
sub/
sub/a/
sub/b/
sub/b/file4

