#include <bits/stdc++.h>

using namespace std;

#include <atcoder/modint>
using mint = atcoder::modint998244353;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int n;
    cin >> n;
    vector<int> a(n);
    vector<string> b(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    vector<pair<int, int>> ab, la;
    for (int i = 0; i < n; i++) {
        cin >> b[i];
        if (b[i].back() != 'X') {
            ab.push_back({a[i], stoi(b[i])});
        } else if (b[i] == "X") {
            la.push_back({a[i], 0});
        }
    }
    vector dp(5, vector(34, vector<mint>(9)));
    dp[0][0][0] = 1;
    for (auto [a, b] : ab) {
        vector dp_new(5, vector(34, vector<mint>(9)));
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 34; j++) {
                for (int k = 0; k < 9; k++) {
                    dp_new[i][j][k] += dp[i][j][k];
                    if (i + a < 5 && j + b < 34 && k < 8) {
                        dp_new[i + a][j + b][k + 1] += dp[i][j][k];
                    }
                }
            }
        }
        dp = dp_new;
    }
    mint ans = 0;
    for (auto [a, b] : la) {
        ans += dp[4 - a][33][8];
    }
    cout << ans.val() << endl;
}