
a = input()

if a[-1]=="2" or a[-1]=="4 "or a[-1]=="5" or a[-1]=="7" or a[-1]=="9":
    print("hon")

elif a[-1]=="0" or a[-1]=="1" or a[-1]=="6" or a[-1]=="8":
    print("pon")

else :
    print("bon")