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")
else:
    print("bon")