- setup:
  cleanup:
  args:
  input:    |
            |/
            |/a/b/c/d
            |/a/b/cd
            |/a/b/cc
            |/a/b/c/d/e
  output:   /a/b
- setup:
  cleanup:
  args:
  input:    |
            |:
            |:a:b:c:d
            |:a:b:cd
            |:a:b:cc
            |:a:b:c:d:e
  output:   ":a:b"
- setup:
  cleanup:
  args:
  input:    |
            |/
            |/b/c/d
            |/a/b/c/d
            |/a/b/cd
            |/a/b/cc
            |/a/b/c/d/e
  output:   |
            |
- setup:
  cleanup:
  args:
  input:    |
            |/
            |/a/b
            |/a/b/cd
            |/a/b/cc
            |/a/b/c/d/e
  output:   /a/b