function main(input){
    let a = input.trim();
    a = a.slice( -1 );
    a = parseInt(a);
    if (a == 2 || a == 4 || a == 5 || a== 7 || a== 9) {
        console.log('hon');      
        
    } else if (a == 0 || a == 1 || a == 6 || a == 8){
        console.log('pon');
        
    } else{
        console.log('bon');
        
    }
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));