Since Adidas is an official sponsor for the 2014 FIFA World Cup, rival shoe makers have come up with several ways to stand out at the World Cup without violating any rules. Several high profile footballers are wearing shoes by the German footwear maker Puma, which are under the "evoPOWER Tricks" brand.
What asymmetry do pairs of shoes in this brand use to get noticed, perhaps both equally by girls and boys?
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One shoe in the pair is blue, while the other is pink.
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