n = list(str(input()))

if n[-1] == 2 or n[-1] == 4 or n[-1] == 5 or n[-1] == 7 or n[-1] == 9:
  print('hon')
elif n[-1] == 0 or n[-1] == 1 or n[-1] == 6 or n[-1] == 8:
  print('pon')
else:
  print('bon')