1. type=dir
2./a type=dir
3./a/change-dir-to-link type=link mode=0755
4./b type=dir
5./b/change-link-to-dir type=dir mode=0755
6./c type=dir
7./c/aaa type=file
8./c/change-dir-to-link type=link mode=0755
9./c/zzz type=file
10./d type=dir
11./d/aaa type=file
12./d/zzz type=file
13./d/change-link-to-dir type=dir mode=0755
14