Data:10 83/PD Presentation

X₁₆₂₇ X_5,16,6,17 X_13,1,14,20 X_7,15,8,14 X₃₉₄₈ X_9,5,10,4 X_19,11,20,10 X_11,19,12,18 X_17,13,18,12 X_15,2,16,3