let input = require('fs').readFileSync('/dev/stdin', 'utf8');

const last = input.slice(-1);
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');
}