#include <stdio.h>

int main(void) {
    int N;

    scanf("%d", &N);

    switch(N % 10) {
        case 2:
        case 4:
        case 5:
        case 7:
        case 9:
            printf("hon\n");
            return 0;
        case 0:
        case 1:
        case 6:
        case 8:
            printf("pon\n");
            return 0;
        case 3:
            printf("bon\n");
            return 0;
    }

    return 0;
}
