n=list(input())
n=reversed(n)

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