Data:T(27,2)/PD Presentation

[math]\displaystyle{ X(1,29,2,28) X(3,31,4,30) X(5,33,6,32) X(7,35,8,34) X(9,37,10,36) X(11,39,12,38) X(13,41,14,40) X(15,43,16,42) X(17,45,18,44) X(19,47,20,46) X(21,49,22,48) X(23,51,24,50) X(25,53,26,52) X(27,1,28,54) X(29,3,30,2) X(31,5,32,4) X(33,7,34,6) X(35,9,36,8) X(37,11,38,10) X(39,13,40,12) X(41,15,42,14) X(43,17,44,16) X(45,19,46,18) X(47,21,48,20) X(49,23,50,22) X(51,25,52,24) X(53,27,54,26) }[/math]