/* package whatever; // don't place package name! */
 
import java.math.*;
import java.security.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args)
	{
		SecureRandom rnd = new SecureRandom();
		BigInteger p = new BigInteger(512, 128, rnd);
		System.out.println(p);
	}
}