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] = 1 :
    print("pon")
elif N[-1] = 6 :
    print("pon")
elif N[-1] = 8 :
    print("pon")
else :
    print("bon")