1: 0 + 1 =
2: 10 + 0 =
3: 4 + 5 =
4: 3 + 1 =
5: 1 + 7 =
6: 1 + 7 =
7: 3 + 10 =
8: 4 + 5 =
9: 10 + 6 =
10: 5 + 6 =
11: 10 + 0 =
12: 2 + 9 =
13: 6 + 3 =
14: 1 + 0 =
15: 0 + 0 =
16: 0 + 5 =
17: 6 + 8 =
18: 10 + 7 =
19: 1 + 6 =
20: 5 + 7 =