The correct code ;-;

var a_challenge;
var reverse = function(s) {
    return s.split("").reverse().join("");
}
var coder = {
    str_xD: "b2Y",
    str_x1: reverse ("0hwz"),
    str_cN: "bGF3",
    str_MH: reverse("==Abpzwz"),
    request:function(preference) {
        return preference + " Secret word is "+ this.str_x1 + this.str_cN + this.str_xD + this.str_MH;
    }
};
coder.request (a_challenge);