#include <bits/stdc++.h>
using namespace std;

long long mod = 998244353;
//入力が必ずmod未満の時に使う.
struct mint{
    long long v = 0;
    mint(){} mint(int a){v = a;} mint(long long a){v = a;} mint(unsigned long long a){v = a;}
    long long val(){return v;}
    void modu(){v %= mod;}
 
    mint repeat2mint(const long long a,long long b){
        mint ret = 1,p = a;
        while(b){
            if(b&1) ret *= p;
            p *= p; b >>= 1;
        }
        return ret;
    };
 
    mint operator+(const mint b){return mint(v)+=b;}
    mint operator-(const mint b){return mint(v)-=b;}
    mint operator*(const mint b){return mint(v)*=b;}
    mint operator/(const mint b){return mint(v)/=b;}
 
    mint operator+=(const mint b){
        v += b.v; if(v >= mod) v -= mod;
        return *this;
    }
    mint operator-=(const mint b){
        v -= b.v; if(v < 0) v += mod; 
        return *this;
    }   
    mint operator*=(const mint b){v = v*b.v%mod; return *this;}
    mint operator/=(mint b){
        if(b == 0) assert(false);
        int left = mod-2;
        while(left){if(left&1) *this *= b; b *= b; left >>= 1;}
        return *this;
    }
 
    mint operator++(int){*this += 1; return *this;}
    mint operator--(int){*this -= 1; return *this;}
    bool operator==(const mint b){return v == b.v;}
    bool operator!=(const mint b){return v != b.v;}
    bool operator>(const mint b){return v > b.v;}
    bool operator>=(const mint b){return v >= b.v;}
    bool operator<(const mint b){return v < b.v;}
    bool operator<=(const mint b){return v <= b.v;}
    
    mint pow(const long long x){return repeat2mint(v,x);}
    mint inv(){return mint(1)/v;}
};

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N; cin >> N;
    vector<int> A(N);
    for(auto &a : A) cin >> a;
    vector<string> B(N);
    for(auto &b : B) cin >> b;

    vector<pair<int,int>> one,two;
    for(int i=0; i<N; i++){
        if(B.at(i).back() == 'X'){
            B.at(i).pop_back();
            int x = 0;
            if(B.at(i).size()) x = stoi(B.at(i));
            two.push_back({A.at(i),x});
        }
        else{
            int x = stoi(B.at(i));
            one.push_back({A.at(i),x});
        }
    }

    vector dp(9,vector<vector<mint>>(100,vector<mint>(100)));
    dp.at(0).at(0).at(0) = 1;
    for(auto [a,b] : one){
        for(int i=7; i>=0; i--) for(int k=4; k>=0; k--) for(int l=33; l>=0; l--){
            if(dp.at(i).at(k).at(l) == 0) continue;
            dp.at(i+1).at(k+a).at(l+b) += dp.at(i).at(k).at(l);
        }
    }    

    
    mint answer = 0;
    for(auto [a,b] : two){
        if(b == 0) answer += dp.at(8).at(4-a).at(33-b);
    }
    cout << answer.v << endl;
}