#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
    int n;
    string s;
    cin >> n >> s;
    vector<ll> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a.at(i);
    }

    int Q;
    cin >> Q;
    for (int q = 0; q < Q; q++) {
        ll k;
        cin >> k;
        ll sum = 0;
        int cnt_e = 0;
        int max_cnt = 0;
        int right = 0;
        for (int left = 0; left < n; left++) {
            if (right < left) right = left;
            while (right < n && sum + a.at(right) <= k) {
                sum += a.at(right);
                cnt_e += s.at(right) == 'E';
                right++;
            }
            
            /*if (q == 3) {
                cout << left << " " << right << endl;
                cout << sum << " " << cnt_e << endl;
            }*/
            
            max_cnt = max(max_cnt, cnt_e); 

            if (left < right) {
                sum -= a.at(left);
                cnt_e -= s.at(left) == 'E';
            }
        }
        cout << max_cnt << endl;
    }
}