Data:L10a74/PD Presentation

X₈₁₉₂ X_2,9,3,10 X_10,3,11,4 X_16,5,17,6 X_18,11,19,12 X_20,13,7,14 X_12,19,13,20 X_14,17,15,18 X₆₇₁₈ X_4,15,5,16