Creating a new 2D int Array using a nested for loop [duplicate]

I am trying to print out the 'middle' of the 2D array (a). For example, for given arrays in my code, I would like to print:

[3,4,5,6]

[4,5,6,7]

However I was only able to print out the 'middle' values. I would like to modify the 2D array (n) according to the explanation and print it instead. How would I go about doing this?

Here is my code:

public static int[][] inner (int[][] a) {
    
    int rowL = a.length - 1;
    int colL = a[1].length -1;
    
    for (int row = 1; row < rowL; row++) {
        for (int col = 1; col < colL ; col++) {
            System.out.print(a[row][col]);
            
        }
        System.out.println();
    }
    
    return a;
}

public static void main(String[] args) {
    int [][] a = { {1,2,3,4,5,6},
                   {2,3,4,5,6,7},
                   {3,4,5,6,7,8},
                   {4,5,6,7,8,9}  };
    
    
    
       for (int[] row : a) {
           System.out.println(Arrays.toString(row));
       }
       
       System.out.println();
       
       
       
       for ( int[] row : inner(a) ) {
           System.out.println(Arrays.toString(row));
       }
     
}