#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic pop
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) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
template<class T> void chmax(T& a, const T& b) { a = max(a, b); }
template<class T> void chmin(T& a, const T& b) { a = min(a, b); }
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;

mint dp[1000], ndp[1000];
VI to[1000];

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m, t;
  cin >> n >> m >> t;
  rep(_, m) {
    int s, t;
    cin >> s >> t;
    to[s].push_back(t);
    to[t].push_back(s);
  }
  dp[0] = 1;
  rep(_, t) {
    rep(i, n) for(int j: to[i]) ndp[j] += dp[i];
    rep(i, n) dp[i] = ndp[i], ndp[i] = mint();
  }
  cout << dp[0].val() << '\n';
}