row 1 box 1 row 1 box row 1 box 2 row 1 box 3 row 2 box1 row 2 box row 2 box 3 row 2 box 4 row 3 box 1 row 3 box 2 row 3 box 3 row 3 box 4 row 4 box 1 row 4 box 4 row 4 box 3 row 4 box 4