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

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 );
	}

	const long long MOD = 998244353;
	vector<vector<long long>> dp( T + 1, vector<long long>( N ) );
	dp[0][0] = 1;
	for( int i = 1; i < T + 1; i++ ) {
		for( int j = 0; j < N; j++ ) {
			for( int e : g[j] ) {
				dp[i][j] += dp[i - 1][e];
				dp[i][j] %= MOD;
			}
		}
	}
	long long ans = dp[T][0];

	cout << ans << endl;
}