4
3
-10 6 1 -10
1 -5 -7 -3
5 -9 -5 -4
4
13 10 -15 -10
-10 -17 -19 -20
-4 -8 7 -20
-15 7 -2 -20
5
8 -9 9 -4
-9 -10 4 -6
-4 8 1 -6
-3 -10 -6 -7
-4 -5 -5 0
6
-4 -24 3 -21
-18 -8 25 4
-5 19 -6 -9
2 -12 5 19
20 12 5 -15
18 2 19 7