#337 - Fillomino (Symmetry)

    I find odd numbers easier to work with when using this variant, which led me to a pretty obvious idea for a theme: Odd clues only!

     Divide the grid into regions of orthogonally connected cells. All regions must have 180° rotational symmetry. Two regions of the same size may not share an edge. Clued cells must belong to a region containing the indicated number of cells.

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