I'm not very comfortable with AI, and I'm stuck on this problem ; how can we pass from outline strokes to filled shape ? For example, in this situation, I would like to 'decompose' each shape formed by differente strokes in an unique shape. All my points are situated, so it should be simple I think...

I'm not very comfortable with Illustrator, and I'm stuck on this problem: how can we change from outline strokes to filled shapes?

For example, in this situation, I would like to 'decompose' each shape formed by different strokes into a unique shape. It should be simple I think...