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<?php setlocale(LC_ALL, 'ru_RU.cp1251'); echo preg_replace ( '/[^\p{L}\d]/i', '_', 'ёйцукенгшщзхъфывапролджэячсмитьбю1234567890' );
Output for git.master, git.master_jit, rfc.property-hooks
�_�_�_�_ке�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_�_1234567890

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