#include "bits/stdc++.h"
using namespace std;
#define ln "\n"
#define pb push_back
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define int long long
const int MOD = 1e9 + 7;
const int inf = 2e18;
const int N = 3005;
int h, w, a[N][N], cnt[N][N][3];
signed main() {
cin.tie(0) -> sync_with_stdio(0);
cin >> h >> w;
for(int i = 1; i <= h; i++) {
for(int j = 1; j <= w; j++) {
char c; cin >> c;
if(c == 'I') {
a[i][j] = 1;
cnt[1][j][1]++;
cnt[i][j][1]--;
}
else if(c == 'O') {
a[i][j] = 2;
cnt[i][1][2]++;
cnt[i][j][2]--;
}
}
}
int ans = 0;
for(int i = 1; i <= h; i++) {
for(int j = 1; j <= w; j++) {
cnt[i][j][1] = cnt[i - 1][j][1] + cnt[i][j][1];
cnt[i][j][2] = cnt[i][j - 1][2] + cnt[i][j][2];
}
}
for(int i = 1; i <= h; i++) {
for(int j = 1; j <= w; j++) {
if(a[i][j] == 0) {
ans += cnt[i][j][2] * cnt[i][j][1];
}
}
}
cout << ans << ln;
cerr << "\nTime: " << clock() * 1000 / CLOCKS_PER_SEC;
}
