#include <bits/stdc++.h>
using namespace std;
const long long MOD = 998244353;
int main(){
  int N;
  cin >> N;
  string S;
  cin >> S;
  vector<vector<long long>> dp(N + 1, vector<long long>(3, 0));
  for (int i = 0; i <= N; i++){
    dp[i][0] = 1;
  }
  for (int i = 0; i < N; i++){
    for (int j = 0; j < 3; j++){
      for (int k = 0; k < 10; k++){
        if (k == S[i] - '0' || S[i] == '?'){
          int j2 = (j * 10 + k) % 3;
          dp[i + 1][j2] += dp[i][j];
          dp[i + 1][j2] %= MOD;
        }
      }
    }
  }
  long long ans = 0;
  for (int i = 0; i <= N; i++){
    ans += dp[i][0] + MOD - 1;
  }
  ans %= MOD;
  cout << ans << endl;
}