v1 2 1.8 1.5 1.9 2.1 1.78 1.95 2.0 2.1
v2 2 100 -5.2
v3 1 -1.3 -2 2.3
v4 1 1.5 1.6 1.9 2.1 2.0 2.4 -1.1 2.3 1.5 1.6 1.9 1.8 1.6