2
1 20
20 1
0
0
2
2 20
20 2
2
9 18
18 9
0
0
0
2
20 3
3 20
4
11 17
7 19
19 7
17 11
0
0
0
0
0
2
20 4
4 20
0
0
0
0
2
15 14
14 15
0
0
2
18 10
10 18
6
13 16
19 8
20 5
5 20
8 19
16 13
0
0
0
0
0
0
0
2
17 12
12 17
0
0
2
20 6
6 20
0
0
0
0
2
0 21
21 0
4
19 9
1 21
21 1
9 19
0
0
4
21 2
18 11
11 18
2 21
0
0
0
2
7 20
20 7
3
3 21
15 15
21 3
0
2
14 16
16 14
0
0
0
0
2
4 21
21 4
2
17 13
13 17
0
0
2
10 19
19 10
0
0
2
20 8
8 20
0
2
5 21
21 5
0
2
12 18
18 12
0
0
0
0
0
0
0
0
2
6 21
21 6
0
0
0
4
9 20
15 16
16 15
20 9
2
11 19
19 11
0
2
0 22
22 0
4
1 22
17 14
14 17
22 1
0
0
2
2 22
22 2
0
2
21 7
7 21
0
0
4
18 13
3 22
22 3
13 18
0
0
0
0
0
0
4
22 4
10 20
20 10
4 22