#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < int(n); i++)
constexpr ll MOD = 998244353;

int mex[3][3];

array<ll, 3> f(int &i, string &s) {
  // 0, 1, 2 の場合
  if (s[i] != 'm') {
    array<ll, 3> res = {};
    if (isdigit(s[i]))
      res[s[i] - '0'] = 1;
    else
      res[0] = res[1] = res[2] = 1;
    i++;
    return res;
  }

  // m?x(A,B) の場合
  string m = s.substr(i, 3);
  i += 3;    // "m?x"
  int type;  // 1:max 2:mex 3:m?x
  if (m == "max")
    type = 1;
  else if (m == "mex")
    type = 2;
  else
    type = 3;
  i++;  // '('
  array<ll, 3> a = f(i, s);
  i++;  // ','
  array<ll, 3> b = f(i, s);
  i++;  // ')'

  array<ll, 3> res = {};
  // max
  if (type & 1) {
    rep(i, 3) rep(j, 3) {
      res[max(i, j)] += a[i] * b[j];
      res[max(i, j)] %= MOD;
    }
  }
  // mex
  if (type & 2) {
    rep(i, 3) rep(j, 3) {
      res[mex[i][j]] += a[i] * b[j];
      res[mex[i][j]] %= MOD;
    }
  }
  return res;
}

int main() {
  mex[0][0] = 1, mex[0][1] = 2, mex[0][2] = 1;
  mex[1][0] = 2, mex[1][1] = 0, mex[1][2] = 0;
  mex[2][0] = 1, mex[2][1] = 0, mex[2][2] = 0;
  string s;
  int k;
  cin >> s >> k;
  int i = 0;
  array<ll, 3> a = f(i, s);
  cout << a[k] << "\n";
}