Place the digits 1-5 twice in each row, column and box, except for one digit, which is the "Black Sheep". It is only placed once in every row, column and box. Digits in a cage sum to the clue given in the top left corner. Digits may repeat once in a cage. Adjacent digits on a grey "Austrian Whisper" line must have a difference of at least 3. On a blue "Region Sum" line, digits have an equal sum within each box (region) it passes through. Different lines may have different region sums.