function main(input) {
    var args = input
        .trim()
        .split('\n')
        .map(n => parseInt(n.trim()));
    switch (args[0] % 10) {
        case 2:
        case 4:
        case 5:
        case 7:
        case 9:
            console.log('hon');
            break;
        case 0:
        case 1:
        case 6:
        case 8:
            console.log('pon');
            break;
        case 3:
            console.log('bon');
            break;
    }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
