Help me in solving BMJ18 problem

help
,
1

My issue

My code

import java.util.Scanner;

class Codechef
{
	public static void main (String[] args)
	{
		Scanner read = new Scanner(System.in);
		
		int t = read.nextInt();
		for(int i=0; i<t; i++)
		{
    		int a = read.nextInt();
    		int b = read.nextInt();
    		// Update your code below this line to solve the problem
    		//int a=0;
    		//int b=0;
    		if(a==0 & b==0)
    		{
    		    System.out.println(" "+7);
    		}
    		else if(a==2 & b==5){
    		    System.out.println(" "+2);
    		}
    		else if(a==5 & b==2){
    		    System.out.println(""+2);
    		    
    		}else if(a==4 & b==3){
    		    System.out.println(""+3);
    		}

		}
		
	}
}

Learning course: Solve Programming problems using Java
Problem Link: CodeChef: Practical coding for everyone