Data:10 11/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_7,18,8,19 X_9,20,10,1 X_19,8,20,9 X_17,10,18,11