0+0
0+0 = 0
0+1
0+1 = 1
0+2
0+2 = 2
0+3
0+3 = 3
0+4
0+4 = 4
0+5
0+5 = 5
0+6
0+6 = 6
0+7
0+7 = 7
0+8
0+8 = 8
0+9
0+9 = 9
1+0
1+0 = 1
1+1
1+1 = 2
1+2
1+2 = 3
3+2
3+2 = 5
1+3
1+3 = 4
1+4
1+4 = 5
1+5
1+5 = 6
1+6
1+6 = 7
1+7
1+7 = 8
1+8
1+8 = 9
1+9
1+9 = 10
2+0
2+0 = 2
2+1
2+1 = 3
2+2
2+2 = 4
2+3
2+3 = 5
2+4
2+4 = 6
2+5
2+5 = 7
2+6
2+6 = 8
2+7
2+7 = 9
2+8
2+8 = 10
2+9
2+9 = 11
2+1
2+1 = 31
3+1
3+1 = 4
3+2
3+2 = 5
3+3
3+3 = 6
3+4
3+4 = 7
3+5
3+5 = 8
3+6
3+6 = 9
3+8
3+8 = 11
3+9
3+9 = 12
4+1
4+1 = 5
4+2
4+2 = 6
4+3
4+3 = 7
4+4
4+4 = 8
4+5
4+5 = 9
4+6
4+6 = 10
4+7
4+7 = 11
4+8
4+8 = 12
4+9
4+9 = 13
5+1
5+1 = 6
5+2
5+2 = 7
5+3
5+3 = 8
5+4
5+4 = 9
5+5
5+5 = 10
5+6
5+6 = 11
5+7
5+7 = 12
5+8
5+8 = 13
5+9
5+9 = 14
6+1
6+1 = 7
6+2
6+2 = 8
6+4
6+4 = 10
6+5
6+5 = 11
6+6
6+6 = 12
6+8
6+8 = 14
6+9
6+9 = 15
7+1
7+1 = 8
7+2
7+2 = 9
6+3
6+3 = 91
7+5
7+5 = 12
7+7
7+7 = 14
7+8
7+8 = 15
7+9
7+9 = 16
8+1
8+1 = 9
8+2
8+2 = 10
8+3
8+3 = 11
8+4
8+4 = 12
8+5
8+5 = 13
8+6
8+6 = 14
8+7
8+7 = 15
8+8
8+8 = 16
8+9
8+9 = 17
9+1
9+1 = 10
9+2
9+2 = 11
9+3
9+3 = 12
9+4
9+4 = 13
9+5
9+5 = 14
9+6
9+6 = 15
9+7
9+7 = 16
9+8
9+8 = 17
9+9
9+9 = 18