#include <stdio.h>
 
int main (void)
{
 
    int a;
 
    scanf("%d",&a);
    
    if(a>=10&&a<=999){
        
        a=a%10;
        }
    
    switch (a) {
        case 2:
        case 4:
        case 5:
        case 7:
        case 9:
            printf("hon\n");
            break;
        case 0:
        case 1:
        case 6:
        case 8:
            printf("pon\n");
            break;
        case 3:
            printf("bon\n");
            break;
 
    }
 
    return(0);
 
}