#Ans
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")
else:
    print("bon")