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

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
      
         int [][] mat1 = { {3,4,5} ,
                           {8,5,9} };
                          
         int [][] mat2 = { {2,3,7} ,
                           {1,8,3} };
          
            int [][] result ={ {0,0,0},
                               {0,0,0} };
            
            System.out.println("length of matrices ="+mat1.length);         
        
            
            
           
            for ( int i = 0; i< mat1.length; i++)   
       
         { 
                 System.out.print("{");
                  for (int j=0; j<=mat1.length; j++)
               {
                     System.out.print(mat1[i][j]);
                     System.out.print(",");
                 
                } 
               System.out.println("}");
         }
        
        
               // same for mat2
               System.out.println("2nd matrices");
                
            
             for ( int i = 0; i< mat2.length; i++)   
         { 
                    System.out.print("{");
                  for (int j=0; j<=mat2.length; j++)
                {
                   
                     System.out.print(mat2[i][j]);
                     System.out.print(",");
                    
                 } 
                     System.out.println("}");
          }
                    
 
   // now both matrices sum
    System.out.println("sum of both Matrices");
   
                
 
                  for (int i =0 ; i<mat1.length;i++ )
                  { 
                      for (int j=0 ; j <=mat1.length; j++)
                     { 
                    
                     result[i][j] = mat1[i][j]+mat2[i][j];
                      System.out.print(result[i][j]+" ");

                         // second method 
                   // int result2 = mat1[i][j]+mat2[i][j];
                    //  System.out.print(result2+" ");
             

                   
                     }
                      System.out.println(" ");// new line 
                  }
   
   
   
   
   
   
    }
}