Day 29

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {
    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        int t = scanner.nextInt();
        int h;
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        for (int tItr = 0; tItr < t; tItr++) {
            String[] nk = scanner.nextLine().split(" ");

            int n = Integer.parseInt(nk[0]);

            int k = Integer.parseInt(nk[1]);
            int max = 0;
            for(int i=1;i<n;i++){
                for(int j=i+1;j<=n;j++){
                    h = i & j;
                    if(max<h && h<k)
                      max=h;
                }
            }
            System.out.println(max);
        }
        
        
        

        scanner.close();
    }
}