import java.util.*;
import java.lang.*;
import java.util.regex.*;

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String str = "D[1]+D[0]";
        Pattern p = Pattern.compile("[+-/*]");
        Matcher m = p.matcher(str);
        if (m.find()) {
            System.out.println("Found: " + m.group());
        }
	}
}