series,x,y
Only shared S observed,0,0
Only shared S observed,0.25,0.0625
Only shared S observed,0.5,0.25
Only shared S observed,0.75,0.5625
Only shared S observed,1,1
Only shared S observed,1.5,2.25
Only shared S observed,2,4
Only shared S observed,3,9
Both S and P observed,0,0
Both S and P observed,0.25,0
Both S and P observed,0.5,0
Both S and P observed,0.75,0
Both S and P observed,1,0
Both S and P observed,1.5,0
Both S and P observed,2,0
Both S and P observed,3,0