A.{X,Y}={99,1500}B.{X,Y}={100,999}C.{X,Y}={100,1500}D.{X,Y}={200,1000}
A.{X,Y}={99,1500}B.{X,Y}={100,1500}C.{X,Y}={201,1500}D.{X,Y}={150,999}
A.{X,Y}={100,1500}B.{X,Y}={200,1000}C.{X,Y}={99,1500}D.{X,Y}={100,999}