12 + 1 = 13             4 + 6 = 10               3 + 4 = 7

 

17 + 1 = 18             5 + 6 = 11               2 + 4 = 6

 

11 + 1 = 12             8 + 6 = 14               5 + 4 = 9

 

19 + 1 = 20             4 + 6 = 10               6 + 4 = 10

 

27 + 1 = 28             9 + 6 = 15               5 + 4 = 9

 

33 + 1 = 34             8 + 7 = 15               4 + 4 = 8

 

12 + 1 = 13             4 + 6 = 10               3 + 4 = 7

 

13 + 1 = 14             5 + 6 = 11               2 + 4 = 6

 

31 + 1 = 32             8 + 2 = 10               6 + 4 = 10

 

16 + 1 = 17             4 + 6 = 10               6 + 7 = 13