public class TwoDArray {
    public static void main(String args[]) {
        int twoD[][] = new int[4][5];
        int i, j, k=0;

        for(i = 0;i < 4; i++) {
            for(j = 0; j < 5;j++) {
                twoD[i][j] = k;
                k++;
            }
        }
        for(i = 0; i < 4; i++) {
            for (j = 0; j < 5; j++) {
                System.out.print(twoD[i][j] + " ");
            }
            System.out.println();
        }
    }
}