def main():
  n = 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')
    
main()