N = int(input())

if N[-1] == '2':
  print 'hon'
elif N[-1] == '4':
  print'hon'
elif N[-1] == '5':
  print'hon'
elif N[-1] == '7':
  print 'hon'
elif N[-1] == '9':
   print'hon'
elif N[-1] == '3':
   print'bon'
else:
   print'pon'