n = str(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")