#include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include "debug.h" #else #define debug(...) 42 #endif int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int N, M; cin >> N >> M; vector<string> S(N); for (int i = 0; i < N; ++i) { cin >> S[i]; } vector sf(M, vector<int>(N)); for (int i = 0; i < M; ++i) { sf[i][N - 1] = S[N - 1][i] == 'I'; for (int j = N - 2; j >= 0; --j) { sf[i][j] = sf[i][j + 1] + (S[j][i] == 'I'); } } long long res = 0; for (int i = 0; i < N; ++i) { for (int j = M - 1, cnt = 0; j >= 0; --j) { cnt += S[i][j] == 'O'; if (S[i][j] == 'J') { res += cnt * sf[j][i]; } } } cout << res; return 0; }