function nz(arr1, arr2, arr3, arr4) {
  let firstNumber = arr1;
  let secondtNumber = arr1;
  let thirdNumber = arr1;
  let fourNumber = arr1;

  let currentCombination = 0;

  for (let K = firstNumber; K <= 8; K++) {
    for (let L = 9; L >= secondNumber; L--) {
      for (let M = thirdNumber; M <= 8; M++) {
        for (let N = 9; N >= fourNumber; N--) {
          if (K == M && L == N && K % 2 == 0 && L % 2 != 0) {
            console.log("Cannot change the same player.");
          } else if (K % 2 == 0 && L % 2 != 0 && M % 2 == 0 && N % 2 != 0) {
            console.log(`${K} ${L} - ${M}${N}`);
            currentCombination++;
          }
          if (currentCombination == 6) {
            break;
          }
        }
        if (currentCombination == 6) {
          break;
        }
      }
      if (currentCombination == 6) {
        break;
      }
    }
    if (currentCombination == 6) {
      break;
    }
  }
}