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")
elif N[-1]=="3":
    print("bon")