N = int(input()):

if N % 10 == 2 or N % 10 == 4 or N % 10 == 5 or N % 10 == 7 or N % 10 == 9:
  print('hon')
elif N % 10 == 0 or N % 10 == 1 or N % 10 == 6 or N % 10 == 8:
  print('pon')
else:
  print('bon')