Draw a loop that moves orthogonally between cells and does not visit any cell more than once. Cells containing clues must not be visited by the loop. Every other unvisited cell (i.e. those that do not contain clues) must belong to a pentomino - areas of five orthogonally connected cells. No pentomino shape may repeat and they must not touch each other, not even diagonally. (A rotation or reflection of a pentomino should be treated as a repeat of that pentomino and therefore not allowed.) Not all of the 12 possible pentomino shapes are necessarily used. A clue specifies the number of cells belonging to pentominoes in the indicated direction. To make the "answer check" function work, enter the digit 8 in every cell that contains a pentomino.