Today is army day, but the servicemen are busy with the phalanx for the celebration of the 60th anniversary of the PRC.A phalanx is a matrix of size n*n, each element is a character (a~z or A~Z), standing for the military branch of the servicemen on that position.For some special requirement it has to find out the size of the max symmetrical sub-array. And with no doubt, the Central Military Committee gave this task to ALPCs.A symmetrical matrix is such a matrix that it is symmetrical by the “left-down to right-up” line. The element on the corresponding place should be the same. For example, here is a 3*3 symmetrical matrix:cbxcpbzcc
，趁着有脾气装潇洒，有本钱耍个性，
