func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<long long> a;   int main() {     long long t;     cin >> t;     for (long long ind = 0; ind < t; ++ind) {       long long n, k;       cin >> n >> k;       string s;       cin >> s;       a.clear();       a.resize(26, 0);       long long num = n / k, ans = 0;       for (long long i = 0; i < k; ++i) {         if (i > k - i - 1) break;         for (long long j = i; j < n; j += k) {           a[s[j] -  a ]++;         }         bool p = false;         if (i != k - i - 1) {           p = true;           for (long long j = k - i - 1; j < n; j += k) {             a[s[j] -  a ]++;           }         }         long long m = a[0];         for (long long j = 1; j < 26; ++j) {           if (a[j] > m) m = a[j];         }         if (p)           ans += 2 * num - m;         else           ans += num - m;         a.clear();         a.resize(26, 0);       }       cout << ans <<   n ;     }   }   