Substitute - JS

function func(input){
    let K = Number(input[0]);
    let L = Number(input[1]);
    let M = Number(input[2]);
    let N = Number(input[3]);
    let count = 0;

    for (let i = K; i <= 8; i++) {
        if(count>5){
            break;
        }
        for (let j = 9; j >= L; j--) {
            for (let k = M; k <= 8 ; k++) {
                for (let l = 9; l >= N; l--) {
                    let isPossible = i % 2 == 0 && k % 2 == 0 && l % 2 != 0 && j % 2 != 0;

                    let firstNum = i * 10 + j;
                    let secondNum = k * 10 + l;

                    if(isPossible && firstNum == secondNum){
                        console.log("Cannot change the same player.");
                    }
                    else if(isPossible && firstNum != secondNum){
                        console.log(`${firstNum} - ${secondNum}`);

                    }
                }
            }

        }
        count++;
    }

}



func(["6",
"7",
"5",
"6"])
;