n = int(input())

if (n % 10 = 2) | (n % 10 = 4) | (n % 10 = 5) | (n % 10 = 7) | (n % 10 = 9):
  print("hon")

elif (n % 10 = 0) | (n % 10 = 1) | (n % 10 = 6) | (n % 10 = 8):
  print("pon")

else:
  print("bon")