function x(input) {
    let k = Number (input[0]);
    let l = Number (input[1]);
    let m = Number (input[2]);
    let n = Number (input[3]);

    let counterValid = 0;

    for (i = k; i <= 8 && counterValid != 6; i++) {
      if (i % 2 != 0) {
        continue;
      }

      for (j = 9; j >= l && counterValid != 6; j--) {
        if (j % 2 == 0) {
          continue;
        }
        let sum = ((i) + `${j}`);

        for (y = m; y <= 8 && counterValid != 6; y++) {
          if (y % 2 != 0) {
            continue;
          }

          for (z = 9; z >= n; z--) {
            if (z % 2 == 0) {
              continue;
            }
            let sum2 = ((y) + `${z}`);

            if (sum == sum2) {
              console.log(`Cannot change the same player.`);
            } else {
              counterValid++;
              console.log(`${sum} - ${sum2}`);

              if(counterValid == 6){
                  break
              }

            }
          }
        }
      }
    }
  }