n=int(input())
if 10<n<=100:
    n=n%10
elif 101<=n<=999:
    n=n%100

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")