"use strict";

const main = arg => {
    let arr = arg.trim().split('');
    let last = arr.slice(-1)[0];
    if(last == 2 ||last == 4 || last ==5 || last ==7 || last ==9) {
     console.log('hon');   
    } else if (last == 0 || last ==1 || last ==6 || last ==8) {
        console.log('pon');
    } else {
        console.log('bon');
    }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));  