3x6

(a)  

4x4

(a)  

2x3

(a)  

8x3

(a)  

7x9

(a)  

12x8

(a)  

3x12

(a)  

12x6

(a)  

5x5

(a)  

6x8

(a)  

3x6

(a)  

6x3

(a)  

8x8

(a)  

7x12

(a)  

12x7

(a)  

6x6

(a)  

9x3

(a)  

8x5

(a)  

4x2

(a)  

12x4

(a)  

3x3

(a)  

2x6

(a)  

5x9

(a)  

9x9

(a)  

7x6

(a)  

2x9

(a)  

7x7

(a)  

12x9

(a)  

7x2

(a)  

2x8

(a)  

8x4

(a)  

5x8

(a)  

12x2

(a)  

12x3

(a)  

12x5

(a)  

12x6

(a)  

12x12

(a)  

9x2

(a)  

9x4

(a)  

9x5

(a)  

9x6

(a)  

9x7

(a)  

9x8

(a)  

9x12

(a)  

8x2

(a)  

8x6

(a)  

8x7

(a)  

8x9

(a)  

8x12

(a)  

7x3

(a)  

7x4

(a)  

7x5

(a)  

6x2

(a)  

6x4

(a)  

6x5

(a)  

6x6

(a)  

6x7

(a)  

6x8

(a)  

6x9

(a)  

6x12

(a)  

5x3

(a)  

5x4

(a)  

5x6

(a)  

5x7

(a)  

5x9

(a)  

4x1

(a)  

4x3

(a)  

4x5

(a)  

4x6

(a)  

4x7

(a)  

4x8

(a)  

4x9

(a)  

4x12

(a)  

3x1

(a)  

3x2

(a)  

3x4

(a)  

3x5

(a)  

3x7

(a)  

3x8

(a)  

3x9

(a)  

2x2

(a)  

2x4

(a)  

2x5

(a)  

2x7

(a)  

2x12

(a)