Data:L11n289/PD Presentation

X₆₁₇₂ X_5,12,6,13 X₃₈₄₉ X_2,14,3,13 X_14,7,15,8 X_11,18,12,19 X_9,21,10,20 X_19,5,20,10 X_15,1,16,4 X_17,22,18,11 X_21,16,22,17