/* package whatever; // don't place package name! */
 
/* The class name doesn't have to be Main, as long as the class is not public. */
import org.apache.commons.codec.binary.Base64; 
 
class Main
{
  public static void main (String[] args) throws java.lang.Exception
  {
  String encodedBytes ="LyJwNh9iPil3MyMSGRhWCCpXBExXAWZBGg1eFjNcShpSCmZxCwJSAC9TBDxbBTRfCw9KRDNbHkxHCzISBwNBAyNcRkxJAWZfBQlHASgSDgkTEilAAwtWRCRTHg9bATUSBANURCRXHg1fASg=";
  String message = decodeBase64(encodedBytes); 
  String paramString = "jl3dF2";
  int paramInt= 2;
  String str= "";
 
      System.out.println("----------------- START ---------------------");
           for (int i = 0; i < message.length(); i++)
      {
        int k = paramString.charAt(i % paramString.length());
        int j = message.charAt(i);
        k &= 1 << paramInt;
        str = str + (k ^ j);
      }
      System.out.println(str);
  }
}

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