/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;
import java.text.SimpleDateFormat;


/* 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
	{
		long startTimeMillis = 0;
		long timeDelta = System.currentTimeMillis()-startTimeMillis;

		SimpleDateFormat simpleDateFormat = new SimpleDateFormat ("mm:ss:SS");
		System.out.println(simpleDateFormat.format(timeDelta));
		
	}
}