#include <iostream>
#include <vector>
#include <string>
using namespace std;
using ll = long long;
using P = pair<int, vector<int>>;
constexpr ll MOD = 998244353;

vector<P> G;
vector<vector<ll>> dp;

int expr(const string &s, int &i){
    // cerr << i << " " << s[i] << ", ";
    int ret = G.size();
    if(s[i] == 'm'){
        G.emplace_back(0, vector<int>{});
        if(s[i+1] == 'a'){// max
            G[ret].first = 4;
        }else if(s[i+1] == 'e'){// mex
            G[ret].first = 5;
        }else{// m?x
            G[ret].first = 6;
        }
        i += 4;
        int x = expr(s, i);
        G[ret].second.emplace_back(x);
        // cerr << "add ok" << endl;
        i++;
        int y = expr(s, i);
        G[ret].second.emplace_back(y);
        i++;
    }else{
        G.emplace_back(s[i] == '?' ? 3 : s[i]-'0', vector<int>{});
        i++;
    }
    // cerr << "ret: " << ret << ", ";
    return ret;
}

ll f(int v, int x){
    if(dp[x][v] != -1) return dp[x][v];
    auto mex = [](int a, int b){
        for(int res = 0; ; res++){
            if(res != a && res != b) return res;
        }
    };
    dp[x][v] = 0;
    if(G[v].first < 3) dp[x][v] = x == G[v].first ? 1 : 0;
    else if(G[v].first == 3) dp[x][v] = 1;
    else{
        if(G[v].first == 4 || G[v].first == 6){
            for(int i = 0; i < 3; i++){
                for(int j = 0; j < 3; j++){
                    if(max(i, j) == x){
                        dp[x][v] += f(G[v].second[0], i)*f(G[v].second[1], j)%MOD;
                        dp[x][v] %= MOD;
                    }
                }
            }
        }
        if(G[v].first == 5 || G[v].first == 6){
            for(int i = 0; i < 3; i++){
                for(int j = 0; j < 3; j++){
                    if(mex(i, j) == x){
                        dp[x][v] += f(G[v].second[0], i)*f(G[v].second[1], j)%MOD;
                        dp[x][v] %= MOD;
                    }
                }
            }
        }
    }
    return dp[x][v];
}

int main(){
    string s; cin >> s;
    int k; cin >> k;
    {
        int i = 0;
        expr(s, i);
    }
    
    dp = vector<vector<ll>>(3, vector<ll>(G.size(), -1));
    cout << f(0, k) << endl;
    return 0;
}