2
26
-2
2
3
4
10
100
-100
20
3
5
-11
22
31
-3
0
0
0
0
1
2
3
9
1
-3
-4
1
x1-x2-x3-x4-x5-x6-x7-x8-x9-x10-x11-x12-x13-x14-x15-x16-x17-x18-x19-x20-x21-x22-x23-x24-x25-x26
