Minus 1

Front 1

13 - 1 =

Back 1

12

Front 2

12 - 1 =

Back 2

11

Front 3

11 - 1 =

Back 3

10

Front 4

10 - 1 =

Back 4

9

Front 5

9 - 1 =

Back 5

8

Front 6

8 - 1 =

Back 6

7

Front 7

7 - 1 =

Back 7

6

Front 8

6 - 1 =

Back 8

5

Front 9

5 - 1 =

Back 9

4

Front 10

4 - 1 =

Back 10

3

Front 11

3 - 1 =

Back 11

2

Front 12

2 - 1 =

Back 12

1

Front 13

1 - 1 =

Back 13

1