Fill the grid so that every column and every row contains the letters A to C, D or E, as shown above the puzzle. The other cells stay empty. The letters at the border indi|cate which letter can be seen first from this border. So only empty cells but no other letter may be located before. The exam|ple on the side shows a solved puz|zle with let|ters A to C and one empty cell per row and column.