#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001



int main(){
	
	int N,M,T;
	cin>>N>>M>>T;
	
	vector<vector<int>> E(N);
	rep(i,M){
		int s,t;
		cin>>s>>t;
		E[s].push_back(t);
		E[t].push_back(s);
	}
	
	vector<mint> dp(N,0);
	dp[0] = 1;
	
	rep(_,T){
		vector<mint> ndp(N,0);
		rep(i,N){
			rep(j,E[i].size()){
				ndp[E[i][j]] += dp[i];
			}
		}
		swap(dp,ndp);
	}
	
	cout<<dp[0].val()<<endl;
	
	
	return 0;
}