Data:L11n178/PD Presentation

X₈₁₉₂ X_18,9,19,10 X_13,21,14,20 X_3,10,4,11 X_5,14,6,15 X_7,16,8,17 X_15,22,16,7 X_11,4,12,5 X_19,13,20,12 X_21,1,22,6 X_2,18,3,17