4x4=

(a)  

3x3=

(a)  

9x8=

(a)  

8x8=

(a)  

3x6=

(a)  

2x9=

(a)  

8x7=

(a)  

7x6=

(a)  

9x4=

(a)  

8x2=

(a)  

3x7=

(a)  

5x5=

(a)  

5x8=

(a)  

4x9=

(a)  

2x5=

(a)  

2x8

(a)  

7x7=

(a)  

7x4=

(a)  

3x7=

(a)  

5x1=

(a)  

1x8=

(a)  

6x6=

(a)  

5x5=

(a)  

4x4=

(a)  

9x9=

(a)  

2x7=

(a)  

3x8=

(a)  

4x8=

(a)  

9x7=

(a)