function passwordGeneration(input) {
    let n = Number(input[0]);
    let l = Number(input[1]);

    let result = "";

    for (let a = 1; a < n; a++) {
        for (let b = 1; b < n; b++) {

            for (let c = 97; c < 97 + l; c++) {
                let firstChar = String.fromCharCode(c);

                for (let d = 97; d < 97 + l; d++) {
                    let secondChar = String.fromCharCode(d);

                    for (let e = 1; e <= n; e++) {
                        if (a < e && b < e) {
                            result += a + "" + b + firstChar + secondChar + e + " " ;
                            // слагаме "" , за да слее a, b и c и да ги конкатенира
                        }
                    }
                }
            }
        }
    }
    console.log(result);
}
passwordGeneration(['2', '4'])