import java.util.Scanner;

// B - I miss you...
// https://atcoder.jp/contests/abc154/tasks/abc154_b
public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String S = scanner.next();
        scanner.close();

        int sLength = S.length();

        StringBuilder sb = new StringBuilder(S.length());
        for (int i = 0; i < sLength; i++) {
            sb.append("x");
        }

        System.out.println(sb.toString());
    }
}

/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