/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String x = "@646646&";
 
		Pattern regex = Pattern.compile("@(\\d+)&");
		Matcher matcher = regex.matcher(x);
 
		while (matcher.find()) {
			String resultado = matcher.group(1);
			System.out.println(resultado);
		}
	}
}

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