2019 NHSPC north1 pD

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

#define IOS ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define X first
#define Y second
#define Push push_back
#define ALL(x) x.begin(), x.end()

using lli = long long;
using pll = pair<lli, lli>;
using Double = long double;
template<typename T>
using Vector = vector<vector<T>>;
template<typename T>
using prior = priority_queue<T>;

int main() {
    IOS;
    int n, m;
    cin >> n >> m;

    vector<string> mp(n);
    for (auto &x : mp) cin >> x;

    vector<int> row(n, 0), col(m, 0), ls(n + m - 1, 0), rs(n + m - 1, 0);
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            if (mp[i][j] == 'x') {
                ++row[i];
                ++col[j];
                ++ls[i + m - 1 - j];
                ++rs[i + j];
            }
        }
    }

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            if (mp[i][j] == 'x') {
                if (row[i] > 1 or col[j] > 1 or ls[i + m - 1 - j] > 1 or rs[i + j] > 1) {
                    cout << '(' << i << ',' << j << ')';
                }
            }
        }
    }

    cout << "\n";

    return 0;
}