func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     ios ::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long t;     cin >> t;     while (t--) {       long long n, k;       cin >> n >> k;       string s;       cin >> s;       vector<long long> cnt(26);       for (auto u : s) ++cnt[u -  a ];       long long ans = 0;       for (long long period = 1; period <= n; ++period) {         if (k % period) continue;         for (long long times = 1; times <= n; ++times) {           long long length = 0;           for (long long c = 0; c < 26; ++c) length += cnt[c] / times;           if (length < period) continue;           ans = max(ans, period * times);         }       }       cout << ans <<   n ;     }   }   