#include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     long long int n, k, sum = 0;     cin >> n >> k;     long long int a[n];     for (long long int i = 0; i < n; i++) cin >> a[i];     string s;     cin >> s;     vector<long long int> v;     v.push_back(a[0]);     for (long long int i = 1; s[i]; i++) {       if (s[i] == s[i - 1])         v.push_back(a[i]);       else {         sort(v.rbegin(), v.rend());         for (long long int i = 0; i < k && i < v.size(); i++) {           sum += v[i];         }         v.clear();         v.push_back(a[i]);       }     }     sort(v.rbegin(), v.rend());     for (long long int i = 0; i < k && i < v.size(); i++) sum += v[i];     cout << sum;   }   