Data:10 29/PD Presentation

X₁₄₂₅ X_9,12,10,13 X_3,11,4,10 X_11,3,12,2 X_5,16,6,17 X_7,18,8,19 X_13,1,14,20 X_17,6,18,7 X_19,15,20,14 X_15,8,16,9