#include <bits/stdc++.h>
using namespace std;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	vector<string> lines;

	string line;
	while (getline(cin, line) && !line.empty()) {
		lines.push_back(line);
	}

	int ret = 0;
	for (unsigned int r = 0; r < lines.size(); r++) {
		for (unsigned int c = 0; c < lines[r].size(); c++) {
			if (lines[r][c] == 'O') {
				lines[r][c] = '.';
				int rr = r;
				while (rr != 0 && lines[rr - 1][c] == '.') {
					rr--;
				}
				lines[rr][c] = 'O';
				ret += lines.size() - rr;
			}
		}
	}

	cout << ret << '\n';
}