Use 24 cubes whose volumes are all 1cm**3 to form a cuboid with unequal surface area (24 pieces are used each time), how many kinds can be placed at most?
用24个体积是都是1cm**3的正方体木块拼成表面积不相等的长方体(每次都要用24块)，最多可以摆出多少种．
<result>6</result>