#include <bits/stdc++.h>

using namespace std;


char g[100][100];
int n, m;
pair<int,int> get(int x,int y,int direction){
    if(direction == 0) return {x - 1,y};
    else if(direction == 1) return {x, y + 1};
    else if(direction == 2) return {x + 1, y};
    else return {x, y - 1};
}
int vis[100][100];

int main(){
    while(cin >> n >> m){
        for(int i = 0; i < n; i ++) cin >> g[i];
        int x, y, direction;
        for(int i = 0; i < n; i ++){
            for(int j = 0; j < m; j ++){
                
                if(g[i][j] == 'L') direction = 3,x = i, y = j;
                else if(g[i][j] == 'R') direction = 1,x = i, y = j;
                else if(g[i][j] == 'U') direction = 0,x = i, y = j;
                else if(g[i][j] == 'D') direction = 2,x = i, y = j;
                
                vis[i][j] = false;
            }
        }
        int ans = 1;
        vis[x][y] ++;
        while(true)...