#include<stdio.h>

int main() {
    int N;
    scanf("%d", &N);

    if(N % 10 == 2 || N % 10 == 4 || N % 10 == 5 || N % 10 == 7 || N % 10 == 9) {
        printf("hon");
    }
    else if(N % 10 == 0 || N % 10 == 1 || N % 10 == 6 || N % 10 == 8) {
        printf("pon");
    }
    else {
        printf("bon");
    }
    printf("\n");

    return 0;
}
