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| 0 или 1 соответствие (" A menu item that allows the user to search for a pattern A to be represented in pattern B 0 or 1 times. Patterns could be strings, characters, etc. For example, if you want to find any strings that meet the criteria " AB 0 or 1 matches in string", then "CCC", "ABC" meet the criteria, while "ABCAB" doesn't meet.") | |||