import java.util.*;
public class Main {
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
    
        String name = sc.next();

        char[] work = new char[name.length()];

        for(int i = 0; i < name.length(); i++){
            work[i] = 'x';

            //切り出した文字列を一文字ずつ出力
            }
        System.out.println(work);
	}
}
/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