def main() -> (field):
  field x = 2**4
  x == 16
  x = x**2
  x == 256
  field y = 3**3
  y == 27
  field z = y**2
  z == 729
  field a = 5**2
  a == 25
  a = a**2
  a == 625
  a = 5**5
  a == 3125
  return 1