using System;
using System.Security.Cryptography;
using System.Text;

public static class Program {
	public static void Main() {
		byte[] secret = System.Convert.FromBase64String("6fNDiYU0T0/evFpmfycNai/AqF24i+rT0OmuVw0/sGQ=");

		byte[] ciphertext = System.Convert.FromBase64String("9bIjURJIcwoKvQr+ifOTH3HbMX+IqmsRqHuG/I1GfbSX89JE5DcWh/p8QROC5pRAuYZ7"+"ln7RSkHXJdZpVz1LFQ2859WsetvHHui7qYmfxATOO1j0AQuPdAD3FeRH0kR4s/v3c2nV8"+"1DnUXFCnQER/+VWrYdbu5vn8gm+diSE6CHvkK+ODy0ebVi5O6VBnWVjgBUG33VwWiAyIl"+"7Ik435V55WnZgynH3GfbVYoGwZ5UhYtn3yw2yruiLAKu6VTBvnh/ZJP21cHCJSF6NPSd+8"+"1gzWFU/+ECm3cf3uBbCkmKmL7HxRhRxhG0lMtX6ELZOXuw3eDJ1BTu+sSMkV/5Xk+5XX48"+"XmP6CGZ7KmP7Q3Fw1kZmhn0unFyv0Gw8PjT1Ohny/HMgNl16I=");

		byte[] nonce = System.Convert.FromBase64String("RYjpCMtUmK54T6Lk");

		byte[] tag = System.Convert.FromBase64String("FUajWHmZjP4A5qaa1G0kxw==");


		using (var aes = new AesGcm(secret))

		{
			var plaintextBytes = new byte[ciphertext.Length];

aes.Decrypt(nonce, ciphertext, tag, plaintextBytes);

			string decrypt = Encoding.UTF8.GetString(plaintextBytes);

			Console.WriteLine(decrypt);


		}
	}
}