XORNEY (XOR Wait for it)

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

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

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        int t = Integer.valueOf(br.readLine());
        while (t-- > 0)
        {
            String[] values = br.readLine().split(" ");
            long L = Integer.valueOf(values[0]);
            long R = Integer.valueOf(values[1]);
            
            // counting odd numbers
            long count = (R - L) / 2;
            if ((R % 2 != 0) || (L % 2 != 0))
                count = count + 1;
            System.out.println((count % 2 == 0) ? "Even" : "Odd");
        }
	}
}

Status: Runtime Error (NZEC)

Are you trying to run your code without giving custom input?

No. It is giving while submitting.

Gotcha!
The problem is with Sample Input - it contains extra white space characters. Try submitting your code, it should probably work.
Screenshot from 2021-04-23 08-29-23

White Spaces in Sample Input

Run time error when run against sample input (contains white spaces).

Executed Successfully after removing extra white spaces.