Data:K11n64/PD Presentation

$X(2,8,3,7)X(4,2,5,1)X(5,15,6,14)X(8,4,9,3)X(9,17,10,16)X(11,20,12,21)X(13,18,14,19)X(15,7,16,6)X(17,1,18,22)X(19,12,20,13)X(21,10,22,11)$