/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.nio.charset.StandardCharsets;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
 
	    public static String decrypt(String str) {
        SecretKeySpec secretKeySpec = new SecretKeySpec(new byte[]{45, 82, 35, 42, 114, 69, 104, 97, 83, 65, 112, 53, 55, 68, 97, 115}, "AES");
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
            byte[] decode = Base64.getDecoder().decode(str.getBytes(StandardCharsets.UTF_8));
            byte[] copyOfRange = Arrays.copyOfRange(decode, 0, 16);
            byte[] copyOfRange2 = Arrays.copyOfRange(decode, 16, decode.length);
            cipher.init(2, secretKeySpec, new IvParameterSpec(copyOfRange));
            return new String(cipher.doFinal(copyOfRange2), StandardCharsets.UTF_8);
        } catch (Exception unused) {
            return str;
        }
    }
 
 
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		String output = decrypt("4BYlrCNPJZncIACG4mayRywzFfnQhMVCWp4dgGhmF0eAQ7trwjAB1fNz210nuxnGvk4Ctaqlv7TsaIoIbw+lSGPwOxBGGb4Yi6LsQ3mG7TlnT4CSKDKs7sMTImSh4cI9Vuo8i/yXxEIozZB2KhhbsnLrWSxahh4FIMCb7TDDGHo=");
		System.out.println("Decoded: " + output);
	}
}

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