import java.util.*;

class Main {
    // ABC152D
    static final long MOD = 1_000_000_007;
    // 10^9+7
    //static final int MAX = 2_147_483_646;
    static final int MAX = 10_000_000;
    // intの最大値
    static final int INF = 1_000_000_000;
    // 10^9

  
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        int an = a.length();
        for(int i = 0;i < an;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