#include<stdio.h>
signed main(){
    int N;
    scanf("%d",&N);
    N%=10;
    if(N==2||N==4||N==5||N==7||N==9){
        printf("hon\n");
    }
    if(N==0||N==1||N==6||N==8){
        printf("pon\n");
    }
    if(N==3){
        printf("bon\n");
    }
    return(0);
}