Featured Puzzle: Fillomino #3

Fillomino is a popular Japanese puzzle. Divide the grid into polyomino regions that each contain a single number, ranging from 1-9.

• Some regions may be hidden, without a given number at the start.
• Each region is a group of orthogonally contiguous cells with the same digit.
• The number in the region indicates the total number of cells in that region.
• Regions of the same size may not be orthogonally adjacent, though their corners may touch.