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Find the unique solution to
$$ 5\,ninja + retook + quarter + turn = \_\,\_\,\_\,\_ + \_\,\_\,\_\,\_\,\_\,\_\,\_\,\_\,\_\,\_ $$
where each unknown is a different
_ _ _ _ _ _ _ _ _ _ _ _ _ _.
Granted, way more than eight
_ _ _ _ _ _ _ _ _ _ _ _ _ _ s exist, but some are special.
P. S. In case ...