13x1

(a)  

-13x2

(a)  

13 x -3

(a)  

-13 x -4

(a)  

13x5

(a)  

-13 x -6

(a)  

13 x -7

(a)  

-13 x 8

(a)  

13x9

(a)  

-13 x 10

(a)  

-13 x -11

(a)  

13 x -12

(a)  

13x13

(a)  

-13 x 14

(a)  

13 x -15

(a)  

2x1

(a)  

2x2

(a)  

2x3

(a)  

2x4

(a)  

2x5

(a)  

2x6

(a)  

2x7

(a)  

2x8

(a)  

2x9

(a)  

2x10

(a)  

2x11

(a)  

2x12

(a)  

3x1

(a)  

3x2

(a)  

3x3

(a)  

3x4

(a)  

3x5

(a)  

3x6

(a)  

3x7

(a)  

3x8

(a)  

3x9

(a)  

3x10

(a)  

3x11

(a)  

3x12

(a)  

4x1

(a)  

4x2

(a)  

4x3

(a)  

4x4

(a)  

4x5

(a)  

4x6

(a)  

4x7

(a)  

4x8

(a)  

4x9

(a)  

4x10

(a)  

4x11

(a)  

4x12

(a)  

2x0

(a)  

3x0

(a)  

4x0

(a)  

2x13

(a)  

3x13

(a)  

4x13

(a)  

2x14

(a)  

3x14

(a)  

4x14

(a)  

2 x -15

(a)  

-3 x 15

(a)  

-4 x -15

(a)  

-5 x 1

(a)  

5x2

(a)  

5 x -3

(a)  

5x4

(a)  

-5 x 5

(a)  

5x6

(a)  

-5 x -7

(a)  

5x8

(a)  

5 x -9

(a)  

5x10

(a)  

-5 x -11

(a)  

5x12

(a)  

6x1

(a)  

-6 x 2

(a)  

6x3

(a)  

6 x -4

(a)  

6x5

(a)  

-6 x -6

(a)  

6x7

(a)  

-6 x 8

(a)  

6x9

(a)  

6 x -10

(a)  

6x11

(a)  

-6 x -12

(a)  

5x0

(a)  

6x0

(a)  

5 x -13

(a)  

-6 x -13

(a)  

-5 x -14

(a)  

6 x -14

(a)  

-5 x 15

(a)  

-6 x -15

(a)  

7x0

(a)  

7x1

(a)  

7x2

(a)  

7x3

(a)  

7x4

(a)  

7x5

(a)  

7x6

(a)  

7x7

(a)  

7x8

(a)  

7x9

(a)  

7x10

(a)  

7x11

(a)  

7x12

(a)  

8x0

(a)  

8x1

(a)  

8x2

(a)  

8x3

(a)  

8x4

(a)  

8x5

(a)  

8x6

(a)  

8x7

(a)  

8x8

(a)  

8x9

(a)  

8x10

(a)  

8x11

(a)  

8x12

(a)  

7 x -13

(a)  

-8 x -13

(a)  

-7 x 14

(a)  

8 x -14

(a)  

7 x -15

(a)  

-8 x -15

(a)  

9x0

(a)  

9x1

(a)  

9x2

(a)  

9x3

(a)  

9x4

(a)  

9x5

(a)  

9x7

(a)  

9x8

(a)  

9x9

(a)  

9x10

(a)  

9x11

(a)  

9x12

(a)  

10x0

(a)  

10x1

(a)  

10x2

(a)  

10x3

(a)  

10x4

(a)  

10x5

(a)  

10x6

(a)  

10x7

(a)  

10x8

(a)  

10x9

(a)  

10x10

(a)  

10x11

(a)  

10x12

(a)  

-9 x -13

(a)  

10 x -13

(a)  

9 x -14

(a)  

-10 x -14

(a)  

-9 x 15

(a)  

10 x -15

(a)  

14x0

(a)  

14x1

(a)  

14x2

(a)  

14x3

(a)  

14x4

(a)  

14x5

(a)  

14x6

(a)  

14x7

(a)  

14x8

(a)  

14x9

(a)  

14x10

(a)  

14x11

(a)  

14x12

(a)  

14x13

(a)  

14x14

(a)  

14x15

(a)  

15x0

(a)  

15x1

(a)  

15x2

(a)  

15x3

(a)  

15x4

(a)  

15x5

(a)  

15x6

(a)  

15x7

(a)  

15x8

(a)  

15x9

(a)  

15x10

(a)  

15x11

(a)  

15x12

(a)  

15x13

(a)  

15x14

(a)  

15x15

(a)  

11x0

(a)  

11x1

(a)  

11x2

(a)  

11x3

(a)  

11x4

(a)  

11x5

(a)  

11x6

(a)  

11x7

(a)  

11x8

(a)  

11x9

(a)  

11x10

(a)  

11x11

(a)  

11x12

(a)  

12x2

(a)  

12x0

(a)  

12x1

(a)  

12x3

(a)  

12x4

(a)  

12x5

(a)  

12x6

(a)  

12x7

(a)  

12x8

(a)  

12x9

(a)  

12x10

(a)  

12x11

(a)  

12x12

(a)  

11 x -13

(a)  

-12 x 13

(a)  

-11 x -14

(a)  

12 x -14

(a)  

-11 x -15

(a)  

-12 x 15

(a)  

9x6

(a)