- setup:
  cleanup:
  args:     4 6 3 8 15 0 13 18 7 16 14 19 17 5 11 1 12 2 9 10
  input:
  output:   3
- setup:
  cleanup:
  args:     0 1 13 7 6 8 10 11 2 14 16 4 12 9 17 5 3 18 15 19
  input:
  output:   6
- setup:
  cleanup:
  args:     9 8 3 11 5 7 13 19 12 4 14 10 18 2 16 1 0 15 6 17
  input:
  output:   1