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A B tiempo 1 1 3.1 1 1 2.9 2 1 4.1 2 1 4.5 3 1 2.7 3 1 2.6 1 2 3.1 1 2 2.7 2 2 4.5 2 2 4.7 3 2 2.8 3 2 3.1