K=PD[
X[1,15,2,14], X[13,3,14,2], 
X[3,9,4,8],X[9,5,10,4], X[5,11,6,10],X[6,23,7,24], X[24,7,1,8],
X[20,15,21,16], X[16,21,17,22], X[22,17,23,18], X[11,19,12,18], X[19,13,20,12]]