#include <bits/stdc++.h>
using namespace std;
const long long MOD = 998244353;
const long long ONE_SIXTH = 166374059;
int main(){
  int N, K;
  cin >> N >> K;
  vector<long long> P(6, ONE_SIXTH);
  auto mul = [&](vector<long long> A, vector<long long> B){
    vector<long long> C(6, 0);
    for (int i = 0; i < 6; i++){
      for (int j = 0; j < 6; j++){
        C[i * j % 6] += A[i] * B[j];
        C[i * j % 6] %= MOD;
      }
    }
    return C;
  };
  vector<long long> ans(6, 0);
  ans[1] = 1;
  while (N > 0){
    if (N % 2 == 1){
      ans = mul(ans, P);
    }
    P = mul(P, P);
    N /= 2;
  }
  cout << ans[K] << endl;
}