1
2
1
3
4
2
4
6
8
-7
2
2
1
5
9
10
1
2
4
2
7
4
-1
9
11
18
20
-10
22
1
3
2
3
1
-1
-2
-1
-3
-4
-2
-4
-6
-8
7
-2
-10
-5
-9
-1
-2
-4
-2
-7
-4
1
-9
-11
-18
-20
10
-22
-1
0
-2
-3
-1