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2^(22^2) = maximum 2222, 222^2, 22^(22), 2^(222), 22^(2^2), 2^(22^2), 2^(2^(22)), 2^(2^(2^2))
2^(22^2) = maximum 2222, 222^2, 22^(22), 2^(222), 22^(2^2), 2^(22^2), 2^(2^(22)), 2^(2^(2^2))
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