- setup:
  cleanup:
  args:
  input:    |
            [ 0 1 0 1 ]
            [ 0 0 1 0 ]
            [ 1 1 0 1 ]
            [ 1 0 0 1 ]
  output:   1
- setup:
  cleanup:
  args:
  input:    |
            [ 1 1 0 1 ]
            [ 1 1 0 0 ]
            [ 0 1 1 1 ]
            [ 1 0 1 1 ]
  output:   4
- setup:
  cleanup:
  args:
  input:    |
            [ 0 1 0 1 ]
            [ 1 0 1 0 ]
            [ 0 1 0 0 ]
            [ 1 0 0 1 ]
  output:   0