#include <bits/stdc++.h>
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)

using std::cin;
using std::cout;
using std::vector;
using mint = modint998244353;

int main() {
	int n, m, t;
	cin >> n >> m >> t;
	
	vector<vector<int>> to(n);
	rep(i, m) {
		int s, t;
		cin >> s >> t;
		to[s].push_back(t);
		to[t].push_back(s);
	}
	
	vector<mint> dp(n);
	dp[0] = 1;
	rep(i, t) {
		vector<mint> p(n);
		swap(dp, p);
		rep(j, n) {
			for (int k : to[j]) {
				dp[j] += p[k];
			}
		}
	}
	
	cout << dp[0].val() << '\n';
	
	return 0;
}