n = int(input())
if n == 0:
  print('hon')
else:
  n = n % 10
  if n == 2 or n == 4 or n == 5 or n == 9:
    print('hon')
  elif n == 0 or n == 1 or n == 6 or n == 8:
    print('pon')
  else:
    print('bon')