import java.util.*;

public class Main{

    static int mod = (int) 1e9 + 7;
    static int dx[] = {-1, 0, 1, 0}, dy[] = {0, -1, 0, 1};
    static int INF = Integer.MAX_VALUE/2;

    public static void main(String args[]){

        Scanner scan = new Scanner(System.in);

        //Queue<int[]> q = new ArrayDeque<int[]>();
        String s = new String(scan.next());

        String st = "";
        for(int i=0;i<s.length();i++){
            st = st + "x";
        }
        System.out.println(st);
    }

    static int factorial(int n){
        if(n == 0){
          return 1;
        }
        return n * factorial(n-1);
    }


}
/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