Data:10 89/PD Presentation

X₄₂₅₁ X_12,8,13,7 X₈₃₉₄ X_2,9,3,10 X_20,13,1,14 X_14,5,15,6 X_6,19,7,20 X_18,16,19,15 X_16,11,17,12 X_10,17,11,18