5 + 6 = 11
6 + 5 = 11
11 − 5 = 6
11 − 6 = 5
9 + 2 = 11
2 + 9 = 11
11 − 9 = 2
11 − 2 = 9
4 + 7 = 11
7 + 4 = 11
11 − 4 = 7
11 − 7 = 4
8 + 3 = 11
3 + 8 = 11
11 − 8 = 3
11 − 3 = 8
 

6 + 6 = 12
12 − 6 = 6
9 + 3 = 12
3 + 9 = 12
12 − 9 = 3
12 − 3 = 9
7 + 5 = 12
5 + 7 = 12
12 − 7 = 5
12 − 5 = 7
8 + 4 = 12
4 + 8 = 12
12 − 8 = 4
12 − 4 = 8
 

7 + 6 = 13
6 + 7 = 13
13 − 7 = 6
13 − 6 = 7
4 + 9 = 13
9 + 4 = 13
13 − 4 = 9
13 − 9 = 4
5 + 8 = 13
8 + 5 = 13
13 − 5 = 8
13 − 8 = 5
 

5 + 9 = 14
9 + 5 = 14
14 − 5 = 9
14 − 9 = 5
8 + 6 = 14
6 + 8 = 14
14 − 8 = 6
14 − 6 = 8
7 + 7 = 14
14 − 7 = 7
 

8 + 7 = 15
7 + 8 = 15
15 − 8 = 7
15 − 7 = 8
6 + 9 = 15
9 + 6 = 15
15 − 6 = 9
15 − 9 = 6
 

7 + 9 = 16
9 + 7 = 16
16 − 7 = 9
16 − 9 = 7
8 + 8 = 16
16 − 8 = 8
 

8 + 9 = 17
9 + 8 = 17
17 − 8 = 9
17 − 9 = 8
 

9 + 9 = 18
18 − 9 = 9