class Kruzya {
    #keys; // private, you can't steal my keys!
    #count;

    constructor(name, count = 0) {
        this.#keys = [];
        this.name = name;
        this.#count = count;
    }

    stealKeys() {
        for (const iterator of new Array(this.#count).fill(0)) {
            this.#keys.push(iterator);
        }
    }

    getInfo() {
        console.log("%s, steal [%s] of your keys!", this.name, this.#keys.length);
    }

}

const kruzya = new Kruzya("Kruzya", ~~(Math.random() * 500));
kruzya.stealKeys();
kruzya.getInfo()