function main(input){
    let a = input.slice( -1 );
    a = Number(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"));