#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

#include <atcoder/modint>
using mint = atcoder::modint998244353;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n, m, t;
  cin >> n >> m >> t;
  vector Graph(n, vector<int>());
  rep(_, m) {
    int a, b;
    cin >> a >> b;
    Graph[a].push_back(b);
    Graph[b].push_back(a);
  }
  vector<mint> dp(n, 0);
  dp[0] = 1;
  rep(_, t) {
    vector<mint> ndp(n, 0);
    rep(i, n) for (int j : Graph[i]) ndp[j] += dp[i];
    swap(dp, ndp);
  }
  cout << dp[0].val() << '\n';
  return 0;
}