25. One day, the owner put more than 60 identical chess pieces into some identical boxes, with only one box being empty. The mischievous Tom cat took one piece from each of the boxes that had pieces and put them into the empty box. The clever Jerry mouse rearranged the boxes, and as a result, the position of each box and the number of pieces in each box looked the same as before. Therefore, there are $\qquad$ boxes.
$12$