4
1 2 0 0
3 2 0 0
0 0 4 0
0 0 2 -2
4
1/1 2/1 0/1 0/1
0/1 0/1 2/1 -2/1
3/1 2/1 0/1 0/1
0/1 0/1 4/1 0/1
5
0/1 0/1
1/1 2/1
2/1 -2/1
3/1 2/1
4/1 0/1
0
1
4
1/1 2/1 0/1 0/1
0/1 0/1 2/1 -2/1
3/1 2/1 0/1 0/1
0/1 0/1 4/1 0/1

