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

      String s1=sc.next();
      String d="";
      for(int i=0;i<s1.length();i++)
            d+='x';
            
      System.out.print(d);
      


      }
}  
/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