import java.util.Scanner;

public class Main {
    // AtCoder Beginner Contest 154
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String S = scanner.nextLine();
        for(int x = 0; x<S.length(); x++){
            System.out.print("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