#include <bits/stdc++.h>  // {{{

// https://codeforces.com/blog/entry/96344

#pragma GCC optimize("O2,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

using namespace std;

template <typename T>
constexpr T MIN = std::numeric_limits<T>::min();

template <typename T>
constexpr T MAX = std::numeric_limits<T>::max();

template <typename T>
[[nodiscard]] static T sc(auto&& x) {
  return static_cast<T>(x);
}

template <typename T>
[[nodiscard]] static T sz(auto&& x) {
  return static_cast<T>(x.size());
}

template <typename... Args>
void pr(std::format_string<Args...> fmt, Args&&... args) {
  std::print(fmt, std::forward<Args>(args)...);
}

template <typename... Args>
void pr(std::format_string<Args...> fmt) {
  std::print(fmt);
}

template <typename... Args>
void prln(std::format_string<Args...> fmt, Args&&... args) {
  std::println(fmt, std::forward<Args>(args)...);
}

template <typename... Args>
void prln(std::format_string<Args...> fmt) {
  std::println(fmt);
}

using ll = long long;
using ld = long double;
template <typename T>
using vec = std::vector<T>;

#define ff first
#define ss second
#define eb emplace_back
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

#define FORI(a, b, c) for (int a = (b); a < (c); ++a)
#define ROFI(a, b, c) for (int a = (b); a > (c); --a)
#define FORLL(a, b, c) for (ll a = (b); a < (c); ++a)
#define ROFLL(a, b, c) for (ll a = (b); a > (c); --a)  // }}}

void solve() {
  int n;
  cin >> n;
  vec<ll> a(n);
  vec<ll> prefix(n + 1, 0);
  FORI(i, 0, n) {
    cin >> a[i];
    prefix[i + 1] = prefix[i] + a[i];
  }
  string s;
  cin >> s;

  int l = 0, r = n - 1;
  ll ans = 0;

  while (l < r) {
    if (s[l] == 'L' && s[r] == 'R') {
      ans += prefix[r + 1] - prefix[l];
      ++l;
      --r;
    } else if (s[r] == 'L') {
      --r;
    } else {
      ++l;
    }
  }
  prln("{}", ans);
}

int main() {  // {{{
  cin.tie(nullptr)->sync_with_stdio(false);

  int t = 1;
  cin >> t;

  while (t--) {
    solve();
  }

  return 0;
}  //}}}