/* package whatever; // don't place package name! */
import java.time.Instant;
import java.time.temporal.Temporal;
import java.time.temporal.ChronoUnit;
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
	{
		Instant previous, current, gap;
		current = Instant.now();
			if(pervious != null) {
				gap = ChronoUnit.MILLIS,between(previous,current);
			}
 
	}
}

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