/// @author Camillus <3
#define debug(...) 32
#include "bits/stdc++.h"
#define int long long
using namespace std;

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    string s;
    cin >> s;

    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    string t;
    cin >> t;

    vector<int> b(n);
    for (int i = 0; i < n; i++) {
        cin >> b[i];
    }

    vector<vector<int>> dp(n + 1, vector<int>(n + 1));

    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            dp[i][j] = max(dp[i - 1][j], dp[i][j - 1]);
            if (s[i - 1] == 'W' && t[j - 1] == 'L' && a[i - 1] > b[j - 1]) {
                dp[i][j] = max(dp[i][j], dp[i - 1][j - 1] + a[i - 1] + b[j - 1]);
            }
            if (s[i - 1] == 'L' && t[j - 1] == 'W' && a[i - 1] < b[j - 1]) {
                dp[i][j] = max(dp[i][j], dp[i - 1][j - 1] + a[i - 1] + b[j - 1]);
            }
        }
    }

    cout << dp[n][n] << '\n';
    return 0;
}