Data:L11n427/PD Presentation

X₈₁₉₂ X_11,18,12,19 X_3,10,4,11 X_19,2,20,3 X_7,16,8,17 X_20,9,21,10 X_17,12,18,7 X_22,16,13,15 X_14,6,15,5 X_4,14,5,13 X_6,21,1,22