#63-65: No-Rectangles Fillomino

made on 2/11/21 and 2/12/21

https://puzz.link/p?fillomino/v:/5/5/7q3j3h3i6

https://puzz.link/p?fillomino/v:/5/5/4g4o7h5g6h3j

https://puzz.link/p?fillomino/v:/7/7/i7q3h3j3l3i3m34h3h 

Variant: neither individual regions nor groups of regions can form a rectangle, except for the grid in its entirety.