# print('input >>')
N = input()
last = int(N[-1])

# print('-----output-----')
if last == 2 or last == 4 or last == 5 or last == 7 or last == 9:
    print('hon')
elif last == 0 or last == 1 or last == 6 or last == 8:
    print('pon')
elif last == 3
    print('bon')