(0.500, 0.289) r=0.577
(0.500, 0.000) r=0.500
(17.818, 14.468) r=5.674
(13.428, 15.607) r=8.732
(14.582, 17.320) r=17.368
(16.727, 17.274) r=19.659
(17.882, 14.892) r=19.449
(15.075, 16.811) r=19.660
(16.570, 17.582) r=18.736
(15.080, 17.034) r=20.318
(17.335, 15.507) r=19.644
(17.033, 15.613) r=19.873
(16.858, 16.846) r=21.007
(15.034, 15.798) r=20.840