const input = require("fs").readFileSync("/dev/stdin", "utf8");
const lastChar = (input + "").split(-1);
switch (lastChar) {
    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;
}