F core

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F coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF coreF core