function sym(args) {


  let originalArr = [...arguments];

  let arr = originalArr;

  let newArray = [];

  let counter = 0;

  let arr2 = [];

  console.log(arr);


  while (true) {



  if (arr.length > 2 || counter > 0) {

    if (counter > 0) {

      arr2 = [];

      arr2.push(arr,originalArr[counter + 1]);

      arr = arr2;

      console.log(arr);

    } else {

      arr2.push(arr[0], arr[1]);

      arr = arr2;

    }

  }



  newArray = [];


  arr.reduce((curr, prev) => {

    counter++;

    curr.filter(par => {

      for (let i = 0; i < prev.length; i++) {

        if (par === prev[i]) {

          newArray.push(par);

        }

      }

    }

    );

  }

  );


  arr = arr.flat();

  arr = [...new Set(arr)];


  for (let i = 0; i < newArray.length; i++) {


    for (let j = 0; j < arr.length; j++) {

      if (arr[j] === newArray[i]) {

        arr.splice(j, 1);

      }

    }

  }




  arr.sort((a, b) => a - b);



  if (counter === originalArr.length - 1) {

    break;

  }




}


return arr;


}




console.log(sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3]));