#include<bits/stdc++.h>
using namespace std;
const int MOD = 998244353;
int main() {
  int N;
  cin >> N;
  vector<int> A(N);
  vector<string> B(N);
  for (int i = 0; i < N; i++) {
    cin >> A[i];
  }
  for (int i = 0; i < N; i++) {
    cin >> B[i];
  }
  vector DP(N + 1, vector(11,  vector(6, vector<long long>(35, 0LL))));
  DP[0][0][0][0] = 1;
  for (int i = 0; i < N; i++) {
    for (int j = 0; j <= 9; j++) {
      for (int k = 0; k <= 4; k++) {
        for (int l = 0; l <= 33; l++) {
          if (DP[i][j][k][l]) {
            DP[i + 1][j][k][l] += DP[i][j][k][l];
            DP[i + 1][j][k][l] %= MOD;
            if (B[i].back() != 'X') {
              if (k + A[i] <= 4 && l + stoi(B[i]) <= 33) {
                DP[i + 1][j + 1][k + A[i]][l + stoi(B[i])] += DP[i][j][k][l];
                DP[i + 1][j + 1][k + A[i]][l + stoi(B[i])] %= MOD;
              }
            }
          }
        }
      }
    }
  }
  long long ans = 0;
  for (int i = 0; i < N; i++) {
    if (B[i] == "X") {
      ans += DP[N][8][4 - A[i]][33];
      ans %= MOD;
    }
  }
  cout << ans << endl;
}