#include <iostream>
#include <string>
#include <utility>
#include <vector>

int solve(int N, int K, std::string w, std::vector<int> l) {
  // Your code here.
  return 0;
}

int main() {
  int n, k;
  std::string s;
  std::cin >> n >> k >> s;

  std::vector<int> l(k);
  for (int i = 0; i < k; ++i) {
    std::cin >> l[i];
  }

  int result = solve(n, k, std::move(s), std::move(l));
  std::cout << result << "\n";
  return 0;
}