#include <bits/stdc++.h>
using namespace std;
const int MAX = 200007;
const int MOD = 1000000007;
void solve() {
int n, m;
cin >> n >> m;
char c;
cin >> c;
if (c == '.') {cout << 0; return;}
else if (c == 'F') {c = 'R';}
else {c = 'F';}
for (int i = 2; i <= n * m; i++) {
char d;
cin >> d;
if (d == c) {cout << 2; return;}
}
cout << 1;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
//freopen("in.in", "r", stdin); freopen("out.out", "w", stdout);
//int tt; cin >> tt; for (int i = 1; i <= tt; i++) {solve();}
solve();
}
