Data:10 3/PD Presentation

X₁₆₂₇ X_11,16,12,17 X_5,13,6,12 X_3,15,4,14 X_13,5,14,4 X_15,3,16,2 X_7,20,8,1 X_9,18,10,19 X_17,10,18,11 X_19,8,20,9