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import java.io.*;

import java.util.*;

import java.security.*;

public class JavaSHA_256 {

public static void main(String[] args) throws NoSuchAlgorithmException {

/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

Scanner input = new Scanner(System.in);

MessageDigest m = MessageDigest.getInstance("SHA-256");

m.reset();

m.update(input.nextLine().getBytes());

input.close();

for (byte i : m.digest()) {

System.out.print(String.format("%02x", i));

}

System.out.println();

}