Data:10 68/PD Presentation

X₄₂₅₁ X_12,4,13,3 X_20,13,1,14 X_16,5,17,6 X_8,19,9,20 X_18,9,19,10 X_10,17,11,18 X_14,7,15,8 X_6,15,7,16 X_2,12,3,11