#include <bits/stdc++.h>   using namespace std;   const int MAX = 2e3 + 5;   char a[MAX][MAX];   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0), cout.tie(0);     int n, m, k;     cin >> n >> m >> k;     for (int i = (1); i <= (n); ++i)       for (int j = (1); j <= (m); ++j) cin >> a[i][j];     int ans = 0;     for (int i = (1); i <= (n); ++i) {       int cnt = 0;       for (int j = (1); j <= (m); ++j) {         if (a[i][j] ==  . )           ++cnt;         else {           if (cnt >= k) ans += cnt - k + 1;           cnt = 0;         }       }       if (cnt >= k) ans += cnt - k + 1;     }     if (k > 1) {       for (int i = (1); i <= (m); ++i) {         int cnt = 0;         for (int j = (1); j <= (n); ++j) {           if (a[j][i] ==  . )             ++cnt;           else {             if (cnt >= k) ans += cnt - k + 1;             cnt = 0;           }         }         if (cnt >= k) ans += cnt - k + 1;       }     }     cout << ans <<   n ;     return 0;   }   