#include <bits/stdc++.h>
using namespace std;
const long long MOD = 998244353;
int main(){
  int N, K;
  cin >> N >> K;
  vector<int> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  map<int, int> mp;
  for (int i = 0; i < N; i++){
    mp[A[i]]++;
  }
  vector<long long> dp(K + 1, 0);
  dp[0] = 1;
  int S = 0;
  for (auto P : mp){
    int cnt = P.second;
    vector<vector<vector<long long>>> dp2(S + 2, vector<vector<long long>>(cnt + 1, vector<long long>(K + 1, 0)));
    dp2[0][0][0] = 1;
    for (int i = 0; i <= S; i++){
      for (int j = 0; j <= cnt; j++){
        for (int k = 0; k <= K; k++){
          if (dp2[i][j][k] != 0){
            for (int l = 0; l <= cnt - j; l++){
              if ((S - i) * l <= K - k){
                int k2 = k + (S - i) * l;
                dp2[i + 1][j + l][k2] += dp2[i][j][k];
                dp2[i + 1][j + l][k2] % MOD;
              }
            }
          }
        }
      }
    }
    vector<long long> dp3(K + 1, 0);
    for (int i = 0; i <= K; i++){
      for (int j = 0; j <= K - i; j++){
        dp3[i + j] += dp[i] * dp2[S + 1][cnt][j] % MOD;
        dp3[i + j] %= MOD;
      }
    }
    swap(dp, dp3);
    S += cnt;
  }
  cout << dp[K] << endl;
}