Data:L11a131/PD Presentation

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