/* package whatever; // don't place package name! */
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* 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 s = "12131415";
    	Pattern p = Pattern.compile("(?<Hour>\\d{2})");
    	Matcher m = p.matcher(s);
    	while (m.find()) {
    	  System.out.println(m.group(1));
    	}
	}
}

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