#include<stdio.h>
int main(void){
    char n[3];
    scanf("%s",&n);
    if(n[2] = '3'){
        printf("bon");
    }else if(n[2]='0'||n[2]='1'||n[2]='6'||n[2]='8'){
        printf("pon");
    }else if(n[2]='2'||n[2]='4'||n[2]='5'||n[2]='7'||n[2]='9'){
        printf("hon");
    }
    return 0;
}
