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")
