[regEx enumerateMatchesInString:[string lowercaseString] options:0 range:NSMakeRange(0, [string length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){
        NSString *toStore = [string substringWithRange:[match range]];
        [keywords addObject:[string substringWithRange:[match range]]];
    }];