#include <bits/stdc++.h>
using namespace std;
const int MX = 1005, SIG = 28;
const long long inf = 1e18;
struct AhoCorasick {
  int sz;
  vector<vector<int>> sig, go;
  vector<int> fail;
  vector<long long> cn;
  void init() {
    sig.assign(1, vector<int>(SIG)), go.assign(1, vector<int>(SIG, -1));
    fail.assign(1, 0), cn.assign(1, 0);
    sz = 0;
  }
  void insert(string &s, long long _cn) {
    int u = 0;
    for (int c : s) {
      c -= 'a';
      if (!sig[u][c]) {
        sig[u][c] = ++sz;
        sig.push_back(vector<int>(SIG)), go.push_back(vector<int>(SIG, -1));
        cn.push_back(0), fail.push_back(0);
      }
      u = sig[u][c];
    }
    cn[u] += _cn;
  }
  int get(int u, int c) {
    if (!u || sig[u][c]) return sig[u][c];
    if (go[u][c] == -1) go[u][c] = get(fail[u], c);
    return go[u][c];
  }
  void build() {
    queue<int> q;
    for (int i = 0; i < (SIG); i++)
      if (sig[0][i]) q.push(sig[0][i]);
    while (q.size()) {
      int u = q.front();
      q.pop();
      for (int c = 0; c < SIG; c++) {
        int v = sig[u][c];
        if (v) {
          fail[v] = get(fail[u], c);
          cn[v] += cn[fail[v]];
          q.push(v);
        }
      }
    }
  }
} ac;
int k, c[MX];
long long res;
string t[MX], s;
vector<int> q;
vector<vector<long long>> mem;
vector<bitset<1 << 14>> bs;
long long dp(int u, int j) {
  int i = __builtin_popcount(j);
  long long act = ac.cn[u];
  if (i == q.size()) return act;
  long long &res = mem[u][j];
  if (bs[u][j]) return res;
  bs[u][j] = 1;
  res = -inf;
  u = ac.get(u, 14 + i);
  for (int k = 0; k < 14; k++)
    if (!(j & (1 << k))) res = max(res, dp(ac.get(u, k), j | (1 << k)));
  res += act;
  return res;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ac.init();
  cin >> k;
  for (int i = 0; i < (k); i++) {
    cin >> t[i] >> c[i];
    ac.insert(t[i], c[i]);
  }
  cin >> s;
  int u = 0;
  ac.build();
  for (char c : s) {
    if (c == '?')
      c = 14;
    else
      c -= 'a';
    u = ac.get(u, c);
    res += ac.cn[u];
  }
  for (int i = 0; i < (s.size()); i++)
    if (s[i] == '?') q.push_back(i);
  ac.init();
  for (int i = 0; i < q.size(); i++)
    for (int j = 0; j < k; j++) {
      int ini = max(0, q[i] - (int)t[j].size() + 1);
      if (i) ini = max(ini, q[i - 1] + 1);
      for (int l = ini; l <= q[i] && l + t[j].size() <= s.size(); l++) {
        string v;
        for (int r = 0; r < t[j].size(); r++)
          if (s[l + r] == '?')
            v.push_back(t[j][r]);
          else if (s[l + r] != t[j][r]) {
            v.clear();
            break;
          }
        if (v.size()) {
          string w;
          for (int r = 0; r < v.size(); r++)
            w.push_back(i + r + 'o'), w.push_back(v[r]);
          ac.insert(w, c[j]);
        }
      }
    }
  mem.assign(ac.sz + 1, vector<long long>(1 << 14));
  bs.resize(ac.sz + 1);
  ac.build();
  cout << res + dp(0, 0) << '\n';
  return 0;
}
