function passWord([arg1, arg2]) {
    let n = Number(arg1);
    let l = Number(arg2);
    let result = '';

    for (let num1 = 1; num1 <= n; num1++) {
        for (let num2 = 1; num2 <= n; num2++) {
            for (let letter1 = 'a'.charCodeAt(0); letter1 < 'a'.charCodeAt(0) + l; letter1++) {
                for (let letter2 = 'a'.charCodeAt(0); letter2 < 'a'.charCodeAt(0) + l; letter2++) {
                    for (let num3 = Math.max(num1, num2) + 1; num3 <= n; num3++) {
                        result += num1 + '' + num2 + '' + String.fromCharCode(letter1) + '' + String.fromCharCode(letter2) + num3 + ' ';

                    }
                }
            }
        }
    }
    console.log(result);
}

passWord(['2', '4']);