RosettaCodeData/Task/Rot-13/Zoea/rot-13.zoea

program: rot13
  case: 1
        input: abc
        output: nop
  case: 2
        input: nop
        output: abc
  case: 3
        input: 'ABC'
        output: 'NOP'
  case: 4
        input: 'NOP'
        output: 'ABC'