import java.io.; import java.util.; import java.text.; import java.math.; import java.util.regex.; import java.security.;

public class Solution {

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner s = new Scanner(System.in);
    String str;
    boolean result = false;

    while(s.hasNext()){
        str = s.nextLine().trim();
        result = Pattern.matches("^[a-zA-Z0-9]+$",str);
        if(result){
            try{
                MessageDigest md = MessageDigest.getInstance("MD5");

                md.update(str.getBytes());

                byte[] digest = md.digest();

                for(byte b : digest){
                    System.out.printf("%02x",b);
                }
                System.out.println();

            } catch (Exception e){

            }                
        } else {
            System.out.println("Invalid Input!");
        }
    }
    s.close();
}

}