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