Data:10 22/PD Presentation

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