import java.util.Scanner;

public class Main{
	public static void main(String[] args){
    		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		
      	//入力された文字数と同じだけxを出力
		for (int i=1; i<=s.length(); i++){
			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