Data:L10n99/PD Presentation

X₆₁₇₂ X_3,11,4,10 X_7,15,8,14 X_13,5,14,8 X_11,18,12,19 X_15,20,16,17 X_19,16,20,9 X_17,12,18,13 X₂₅₃₆ X_9,1,10,4