import sys
input = sys.stdin.readline
def main():
    N = input()
    N_l = list(N)
    m = int(N_l[-1])
    if m == 0 or m == 1 or m==6 or m==8:
        print("pon")
    elif m == 2 or m== 4 or m == 5 or m == 7 or m==9:
        print("hon")
    else:
        print("bon")
if __name__ == "__main__":
    main()
