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<?php $str = 'cats, e.g. Barsik, are funny. And it is true. So,'; $strN = ''; $found = $i = 0; do{ if($str[$i] == '.') $found++; $strN .= $str[$i]; $i++; }while($found != 3); echo $strN;
Output for git.master, git.master_jit, rfc.property-hooks
cats, e.g. Barsik, are funny.

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