import java.util.Scanner;

public class Main{
  public static void main(String args[]){
    Scanner scan = new Scanner(System.in);
    String S = scan.next();
    int T = S.length();
    for(int i=0; i<T; i++){
    	if(i==0) {
    		S="";
    	}
    	S=S+"x";
    }
    System.out.println(S);
  }
}
/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