1 + 18 = 16 − 15 = 11 + 7 = 4 + 1 =
9 − 1 = 9 + 9 = 9 + 1 = 7 + 3 =
16 − 5 = 1 + 9 = 7 − 7 = 14 + 2 =
1 + 12 = 14 + 4 = 10 + 4 = 1 + 11 =
8 − 5 = 8 − 4 = 13 − 2 = 6 + 7 =
12 − 9 = 17 − 14 = 12 − 12 = 7 + 6 =
19 − 8 = 9 − 8 = 19 − 4 = 7 + 10 =
3 − 2 = 5 − 2 = 1 + 1 = 17 − 6 =
6 + 13 = 17 − 8 = 17 − 1 = 18 − 11 =
10 − 2 = 13 − 5 = 19 − 17 = 6 + 11 =
9 − 4 = 14 − 14 = 10 + 3 = 19 − 15 =
15 − 6 = 12 − 4 = 2 + 4 = 12 − 7 =
7 + 5 = 10 − 7 = 2 + 15 = 17 − 9 =
7 + 8 = 12 − 11 = 20 − 10 = 2 − 1 =
10 + 10 = 17 − 12 = 5 + 13 = 13 − 6 =
5 + 12 = 8 + 4 = 4 + 11 = 16 − 6 =
3 + 12 = 2 + 5 = 5 + 9 = 3 + 1 =
15 − 2 = 7 + 12 = 17 + 2 = 3 + 3 =
1 + 3 = 4 − 3 = 20 − 13 = 6 − 1 =
1 + 4 = 18 − 7 = 7 + 7 = 11 + 6 =
5 + 10 = 4 + 13 = 9 + 2 = 9 − 7 =
9 + 7 = 15 + 1 = 20 − 19 = 12 + 3 =
4 + 3 = 1 + 13 = 5 + 2 = 15 − 10 =
5 − 1 = 12 − 3 = 7 − 2 = 11 + 1 =
10 + 1 = 8 + 12 = 15 − 3 = 11 − 6 =