N = input()
if N % 10 == 3:
  print('bon')
elif N % 10 == 0:
  print('pon')
elif N % 10 == 1:
  print('pon') 
elif N % 10 == 6:
  print('pon')
elif N % 10 == 8:
  print('pon')  
else:
  print('hon')
 