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Pentominous (Battleships) (1213)
Instruction:
Locate the indicated fleet of ships in the grid. Ships may be rotated before being placed in the grid. Each piece of a ship occupies a single cell. Ships do not touch each other, not even diagonally (that is, if two ship pieces are in cells that share an edge or a corner, they must be part of the same ship).
Some letters are given in the grid; cells with letters cannot be part of a ship.
Then, divide the non-ship cells of the grid into pentominoes (contiguous regions of five cells) such that every such cell is part of exactly one pentomino. Pentominoes of the same shape (rotations and reflections of a pentomino count as the same shape) cannot touch each other along an edge (but they may touch diagonally). Each cell with a letter must be part of a pentomino with that letter's shape. It is permissible for a pentomino to contain more than one letter, or no letters at all. (It is possible for some pentomino shapes to never appear in the grid, or more than once.)