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Find the integer a such that
Four-Chambered Heart
A heart structure that consists of four chambers (two atria and two ventricles), found in birds and mammals, enabling efficient separation of oxygenated and deoxygenated blood.
Crocodilians
A group of large aquatic reptiles, including alligators, crocodiles, caimans, and gharials.
Modern Reptiles
Current existing species of the class Reptilia, including snakes, lizards, turtles, crocodiles, and alligators, which are cold-blooded and lay eggs.
Hominin Species
Members of the taxonomic group that includes modern humans and all their ancestors, recognized by bipedalism and larger brain sizes relative to body.
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