Author: Vladimir Portugalov
Place the given pentominoes into the grid. Pentominoes may be rotated and reflected. Elements can not touch each other, not even diagonally. Pentominoes cannot be placed in cells with cross. The numbers outside the grid indicate the number of cells occupied by pentominoes in that row or column.
Grid control: Click the mouse button at the selected cell to change the color of the cell. You can also click on the given elements to mark them out. More details about grid control are at the help page.