EndView is a sudoku-like puzzle. You start with an empty square board (size 5x5) with some letters on the sides. Every row and column must contain every letter exactly once (A, B, and C) and the first/last letter of each row and column must correspond to the letter written on the side, if any. There are several variations depending on the size of the board (for example 3x3 or 5x5) and the number of letters (for example A to C or A to D)
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