Charlie: Origami. In origami, there are six basic folds: mountain, valley, diagonal, fold & unfold, reverse, turnover.
Origami is the art of Japanese paper folding. The word literally means "paper folding" in Japanese and refers to all types of paper folding, even those of non-Japanese origin. Origami only uses a small number of different folds, but they can be combined in a variety of ways to make intricate designs.
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