Data:10 139/PD Presentation

X₄₂₅₁ X_10,4,11,3 X_11,19,12,18 X_5,15,6,14 X_7,17,8,16 X_15,7,16,6 X_17,9,18,8 X_13,1,14,20 X_19,13,20,12 X_2,10,3,9