FILLOMINO RULES

Fillomino puzzles are grids that have numbers in them which tell you how to block off the grid into areas.  Seperate the grid by drawing thick lines to block off cells.  Every square in the grid must be used and cells with numbers tell you how many cells are contained in the blocked off area that contain it.  Not all blocked off areas contain a number.  No areas with the same number of cells can be vertically or horizontally adjacent to eachother (in other words, no area of 4 can share an edge with another area of 4).
Small Sample Puzzle: