case 'right': { // 오른쪽 정렬

  const newData = [[], [], [], []];
  data.forEach((rowData, i) => {
    rowData.forEach((cellData, j) => {

      if (rowData[3 - j]) {

        const currentRow = newData[i]
        const prevData = currentRow.at(-1);

        if (prevData === rowData[3 - j]) {

          currentRow[currentRow.length - 1] *= -2;
        } else {

          newData[i].push(rowData[3 - j]);

        }
      }
    });
  });
  console.log(newData);
  [1, 2, 3, 4].forEach((rowData, i) => {
    [1, 2, 3, 4].forEach((cellData, j) => {

      data[i][3 - j] = Math.abs(newData[i][j]) || 0;

    });
  });
  break;
}