#include <bits/stdc++.h>
using namespace std;
int n, m, a, b, mas[30], summ[100005];
long long sum, countt;
string s;
map<pair<char, long long>, int> matr;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  for (int i = 0; i < 26; ++i) cin >> mas[i];
  cin >> s;
  for (int i = 0; i < s.size(); ++i) {
    if (matr.count(make_pair(s[i], sum))) countt += matr[make_pair(s[i], sum)];
    sum += mas[s[i] - 'a'];
    matr[make_pair(s[i], sum)]++;
  }
  cout << countt;
  return 0;
}
