What is the printed output when this program is executed?

public class ReversePrint {
    public static void printReverse(int[][] arr, int i, int j) {
        if (i < 0) return;
        if (j < 0) {
            printReverse(arr, i - 1, arr[0].length - 1);
            return;
        }
        System.out.print(arr[i][j] + " ");
        printReverse(arr, i, j - 1);
    }
    public static void main(String[] args) {
        int[][] grid = { {1, 2}, {3, 4} };
        printReverse(grid, grid.length - 1, grid[0].length - 1);
    }
}