Data:10 72/PD Presentation

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