#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using mint = modint998244353;

int main() {
  int N, M, T; cin >> N >> M >> T;
  vector<vector<int>> G(N);
  for (int i = 0; i < M; i++) {
    int s, t; cin >> s >> t;
    G[s].push_back(t);
    G[t].push_back(s);
  }
  vector<vector<ll>> E(N, vector<ll>(T + 1, 0));
  E[0][0] = 1;
  for (int t = 1; t <= T; t++) {
    for (int i = 0; i < N; i++) {
      for (int j: G[i]) {
        E[i][t] = (E[i][t] + E[j][t - 1]) % 998244353;
      }
    }
  }
  //for (int i = 0; i < N; i++) for (int t = 0; t <= T; t++) cout << E[i][t] << " \n"[t == T];
  cout << E[0][T] << endl;
  return 0;
}