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Suppose you have three strips, each colored on
one side. The width of each strip is 1 unit and their lengths as long
as you need. Using these three Origami strips, can you produce the
three letter shapes shown, with their respective proportions, at the
top of the illustration, i.e. the "T" letter from the red strip, the "O"
letter from the yellow strip and the "Y" letter from the blue one?
While solving this Origami strip puzzle only simple folds (so-called
“book folds”) with no twists or bends are allowed. Note, that during
every single fold you can fold only one(!!) single layer of paper at a
time. At the same time you can perform such a "single-layered" fold so
that after it is done its parts may cover/envelop some other parts of
your sign/shape.
Finally, you should see every letter shape as it is shown; its color/white
parts may be either plain, or composed of several respective elements.
You can mark out, cut off, and precrease your colored paper strips
before the final folds as you need, keeping in mind that your main and
the only challenge is to achieve each of the three letter shapes in
the LEAST number of simple ("single-layered, book") folds. You are not
limited in length of used strips, but try to use a strip as short as
you can to form every letter. And remember that a strip you use should
be always in the form of a narrow rectangle.
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