class ATherefore:
    def solve(self, tc=0):
        n = int(input())
        if n % 10 in [2, 4, 5, 7, 9]:
            print("hon")
        elif n % 10 in [0, 1, 6, 8]:
            print("pon")
        else:
            print("bon")

x = Atherefore()
x.solve()