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
	{
		Pattern yyyymmddPattern = Pattern.compile("\\d{1,2}([-/.])\\d{1,2}\\1\\d{4}");
		String string = "12/12/2019";
		Matcher matcher = yyyymmddPattern.matcher(string);
 
		if(matcher.find()) {
			System.out.println(matcher.group(0));
		}
	}
}

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