B"You are given a bipartite graph: the first part of this graph contains n_1 vertices, the second part contains n_2 vertices, and there are m edges. The graph can contain multiple edges. Initially, each edge is colorless. For each edge, you may either leave it uncolored (it is free), paint it red (it costs r coins) or paint it blue (it costs b coins). No edge can be painted red and blue simultaneously. There are three types of vertices in this graph -- colorless, red and blue. Colored vertices impose additional constraints on edges' colours: Colorless vertices impose no additional constraints. Your goal is to paint some (possibly none) edges so that all constraints are met, and among all ways to do so, you should choose the one with minimum total cost. The first line contains five integers n_1 , n_2 , m , r and b ( 1 <= n_1, n_2, m, r, b <= 200 ) -- the number of vertices in the first part, the number of vertices in the second part, the number of edges, the amount of coins you have to pay to paint an edge red, and the amount of coins you have to pay to paint an edge blue, respectively. The second line contains one string consisting of n_1 characters. Each character is either U, R or B. If the i -th character is U, then the i -th vertex of the first part is uncolored; R corresponds to a red vertex, and B corresponds to a blue vertex. The third line contains one string consisting of n_2 characters. Each character is either U, R or B. This string represents the colors of vertices of the second part in the same way. Then m lines follow, the i -th line contains two integers u_i and v_i ( 1 <= u_i <= n_1 , 1 <= v_i <= n_2 ) denoting an edge connecting the vertex u_i from the first part and the vertex v_i from the second part. The graph may contain multiple edges. If there is no coloring that meets all the constraints, print one in"...