#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; typedef pair<int,int> pii; const int maxn = 3000 + 10; const int inf = 1e9; bool mark[maxn][maxn]; string s[maxn]; int main(){ ios_base::sync_with_stdio(false); int n, m; cin >> n >> m; for (int i = 0; i < n; i++) cin >> s[i]; int answer = 0; for (int i = 0; i < n; i++){ for (int j = 0; j < m; j++){ if (s[i][j] != 'G') continue; if (i > 0 and i < n - 1 and s[i - 1][j] == 'R' and s[i + 1][j] == 'W' and !mark[i - 1][j]) answer ++, mark[i][j] = mark[i - 1][j] = mark[i + 1][j] = 1; else if (j > 0 and j < m - 1 and s[i][j - 1] == 'R' and s[i][j + 1] == 'W' and !mark[i][j + 1]) answer ++, mark[i][j] = mark[i][j - 1] = mark[i][j + 1] = 1; } } cout << answer << '\n'; }