riddle.py

def ask(r):
  p <- [0, 1] # define whether we will speak the truth or not
  s <- [0, 1] # define "ya" as "yes" or "no" randomly
  if r: # question has truthful answer
    if p: # we are speaking the truth
      if s: # the meaning of "ya" is "yes"
        return "ya"
      else:
        return "da"
    else: # we are lying
      if s: # the meaning of "ya" is "yes"
        return "da"
      else:
        return "ya"
  else: # the question has falsy answer
    if p: # we are speaking the truth
      if s: # the meaning of "ya" is "yes"
        return "da"
      else:
        return "ya"
    else: # we are lying
      if s: # the meaning of "ya" is "yes"
        return "ya"
      else:
        return "da"