N=int(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")
elif N[-1]=="3":
  print("bon")
