Data:10 16/PD Presentation

X₆₂₇₁ X_16,8,17,7 X_12,5,13,6 X_14,3,15,4 X_4,13,5,14 X_2,15,3,16 X_20,12,1,11 X_8,20,9,19 X_18,10,19,9 X_10,18,11,17