Data:T(27,2)/PD Presentation

X_21,49,22,48 X_49,23,50,22 X_23,51,24,50 X_51,25,52,24 X_25,53,26,52 X_53,27,54,26 X_27,1,28,54 X_1,29,2,28 X_29,3,30,2 X_3,31,4,30 X_31,5,32,4 X_5,33,6,32 X_33,7,34,6 X_7,35,8,34 X_35,9,36,8 X_9,37,10,36 X_37,11,38,10 X_11,39,12,38 X_39,13,40,12 X_13,41,14,40 X_41,15,42,14 X_15,43,16,42 X_43,17,44,16 X_17,45,18,44 X_45,19,46,18 X_19,47,20,46 X_47,21,48,20