// https://www.hackerrank.com/challenges/sha-256/problem

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import java.util.Scanner;

public class JavaSHA_256 {

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

MessageDigest sha256 = MessageDigest.getInstance("sha-256");

Scanner scanner = new Scanner(System.in);

String message = scanner.nextLine();

scanner.close();

byte[] hash = sha256.digest(message.getBytes());

String hashHexCode = toHex(hash);

System.out.println(hashHexCode);

}

private static String toHex(byte[] array) {

StringBuilder sb = new StringBuilder(2 * array.length);

for(byte b : array) {

sb.append(String.format("%02x", b&0xff));

}

return sb.toString();

}

}