n = int(input())
N = str(n)

if N[-1]=="2" or N[-1]=="4 " or N[-1]=="5" or N[-1]=="7" or N[-1]=="9":
    print("hon")
if N[-1]=="0" or N[-1]=="1" or N[-1]=="6" or N[-1]=="8":
    print("pon")
if N[-1]=="3":
    print("bon")