Data:L10a9/PD Presentation

X₆₁₇₂ X_10,4,11,3 X_12,8,13,7 X_18,14,19,13 X_16,9,17,10 X_8,17,9,18 X_20,16,5,15 X_14,20,15,19 X₂₅₃₆ X_4,12,1,11