On the 5 day of Christmas, my true love gave to me:
Alphabets to Yuletide
How to play A2Y
Santa needs you to fill the empty cells in such a way that they build a chain of letters from A to Y in alphabetical order. The letters at the borders indicate which letter has to be in which row, column and diagonal. All cells with consecutive letters must touch each other either horizontally, vertically or diagonally.