15 0.25 0.390625 0.5 0.78125
15 0.501953125 0.38671875 0.2880859375 0.6884765625
15 0.6884765625 0.4736328125 0.17578125 0.3974609375
15 0.7939453125 0.4853515625 0.2041015625 0.314453125
15 0.900390625 0.509765625 0.080078125 0.1865234375
15 0.927734375 0.369140625 0.1318359375 0.3173828125