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F 1 x2

F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2
F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2
F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2F 1 x2