n = list(map(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] == 4 or n[-1] == 8):
    print('pon')
else:
    print('bon')