n = str(input())

if len(n) != 1:
    n = n[:-1]

if n == "2" or n == "4" or n == "5" or n == "7" or n == "9":
    print("hon")
elif n == "0" or n == "1" or n == "6" or n == "8":
    print("pon")
else:
    print("bon")    
    