import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        String s = sc.next();
        char[] xs = new char[s.length()];
        
        
        //int n = Integer.parseInt(sc.next());
        
        for(int i = 0; i < xs.length; i++) {
            xs[i] = 'x';
        }
        System.out.println(new String(xs));
    }
}
/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