import java.util.regex.*;

class Main
{
    public static void main(String[] args)
    {
        Pattern pattern = Pattern.compile("[a-z][0-9]{2}");
        Matcher matcher = pattern.matcher("sedfdhajkldsfakdsakvsdfasdfr30.reed.op.1xp0");

        if(matcher.find()) {
            System.out.println(matcher.group());	
        }
    }
}