import java.util.*;

public class Main {
  public static void main(final String[] args) {
    final Scanner sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();

    int cnt = s.length();
    String x = "";
    for (int i = 0; i < cnt; ++i){
      x += "x";
    }

      System.out.println(x);
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz