Data:L10n20/PD Presentation

X₆₁₇₂ X_18,7,19,8 X_4,19,1,20 X_11,14,12,15 X₈₄₉₃ X_5,13,6,12 X_13,5,14,20 X_9,16,10,17 X_15,10,16,11 X_2,18,3,17