func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int n, m, xx;     cin >> n >> m >> xx;     map<char, long long int> mp;     vector<char> v[n];     for (long long int i = 0; i < n; i++) {       string s;       cin >> s;       for (auto j : s) v[i].push_back(j);       for (long long int j = 0; j < m; j++) mp[s[j]]++;     }     if (mp[ S ] > 0) {       mp[ S ] = 0;       for (auto i : mp) {         char c = i.first - 32;         if (i.first !=  S ) mp[c]++;       }     }     long long int q;     cin >> q;     string s;     cin >> s;     for (long long int i = 0; i < q; i++) {       if (mp[s[i]] == 0) {         cout <<  -1 ;         return 0;       }     }     vector<pair<long long int, long long int>> shift;     for (long long int i = 0; i < n; i++) {       for (long long int j = 0; j < m; j++) {         if (v[i][j] ==  S ) shift.push_back({i, j});       }     }     vector<long long int> chk[200];     for (long long int i = 0; i < n; i++) {       for (long long int j = 0; j < m; j++) {         for (auto m : shift) {           long long int x = m.first;           long long int y = m.second;           long long int ans = ((x - i) * (x - i)) + ((y - j) * (y - j));           if (ans <= (xx * xx)) chk[v[i][j] - 32].push_back(ans);         }       }     }     long long int c = 0;     for (long long int i = 0; i < q; i++) {       if (s[i] >=  A  && s[i] <=  Z ) {         for (auto j : chk[s[i]]) {           if (j <= (xx * xx)) goto done;         }         c++;       }     done:       1;     }     cout << c;   }   