14. On a rectangular chessboard filled with chess pieces, two players, A and B, take turns to pick up the pieces, following these rules: in a certain row or column, take any continuously placed pieces (i.e., cannot pick across empty spaces), not allowed to skip a turn, and cannot pick from multiple rows (columns) at once. The game ends when all pieces on the board are taken. The player who takes the last piece wins.
Faced with the chessboard as shown in the figure, the first player has a winning strategy. The first player

should take

(all correct solutions), to ensure victory.
$4$