n = input()
if n[-1] == (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")
