import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Main
{
  public static void main (String[] args) throws java.lang.Exception
  {
    String s1 = "abcXY123XYiXYjk";
    String s2 = java.util.regex.Pattern.quote("XY");
    String s3 = "";
    String r = "(?<=(.)|^)"+s2+"(?=(.)|$)";
    Pattern p = Pattern.compile(r);
    Matcher m = p.matcher(s1);
    while(m.find()) s3 += m.group(1)+m.group(2);
    System.out.println(s3);
  }
}

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