#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>
#define LP pair<ll, ll>
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define all(s) s.begin(), s.end()
#define rall(s) s.rbegin(), s.rend()
template<class T>
void chmax(T& a, T b) { a = max(a, b); };
template<class T>
void chmin(T& a, T b) { a = min(a, b); };
vector<int> to[1005];
using mint = modint998244353;

int main() {
  int n,m,t;
  cin >> n >> m >> t;
  rep(i,m) {
    int s, t;
    cin >> s >> t;
    to[s].pb(t);
    to[t].pb(s);
  }
  vector dp(t+1, vector<mint>(n));
  dp[0][0] = 1;
  rep(i,t) {
    rep(j,n) {
      for (int nv : to[j]) {
        dp[i+1][j] += dp[i][nv];
      }
    }
  }
  cout << dp[t][0].val() << endl;

  
  return 0;
}