I faced a problems on vn.spoj.com related to hasing string in the shape of rectangle. This is the link of the problem : http://vn.spoj.com/problems/MESSAGE1/

It says find the maximum area of a rectangle that appears in both input rectangle M * N (the same size)

M, N <= 100;

The rectangle only consists of lower Latin words.

Please help me with this, I've gotten struck with it many days.

P.s Sorry at my bad English :D