The numbers indicate groups of consecutive filled cells in that row or column. For example, a clue of "4 1"
means there is a block of 4 consecutive filled cells followed by at least one empty cell and then a block of 1
filled cell.
Your task is to correctly color the cells to reveal a hidden picture, all while adhering to the number clues
for each row and column.
A cross (usually marked with the right mouse button) means that the cell must remain empty.
The puzzle is solved when all the cells are correctly filled or marked, and the image appears.