Theme: No given 1s or 2s.
Rules: Divide the grid along the gridlines into some regions, and fill each of the empty cells with a number. When two cells containing the same number touch along an edge, they must belong to the same region. Given numbers represent the area of the region they belong to. A region may contain none, or one or more of the givens.
For each region, there must be a region that is identical (both in size and shape).
About: This variant was first explored by Anurag Sahay.
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