#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;

constexpr int M = 200010;
mint dp[M][10];

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  dp[0][0] = dp[0][1] = 1;
  mint p2desc = 4;
  for (int i = 1; i < M; i++, p2desc = p2desc * p2desc * 4) {
    dp[i][0] = p2desc;
    for (int j1 = 0; j1 < 10; j1++) {
      for (int j2 = 0; j1 + j2 < 10; j2++) {
        dp[i][j1+j2] += dp[i-1][j1] * dp[i-1][j2];
      }
    }
  }
  int tt;
  cin >> tt;
  while (tt--) {
    int n, k;
    cin >> n >> k;
    mint ans = dp[n-1][k-1];
    cout << ans.val() << '\n';
  }
}