#include<bits/stdc++.h>
using namespace std;
 
#define st first
#define nd second
#define pb push_back
#define LL long long
#define pii pair<int,int>
#define debug(x) cerr << x << " "
 
const int mod = 998244353;
 
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
 
	int n, m, k;
	cin >> n >> m >> k;
	vector<vector<int> >dp(n+1, vector<int>(k+1,0));
	vector<int>G[n+1];
	int v, w;
	for(int i=0;i<m;i++){
		cin >> v >> w;
		G[v].pb(w);
		G[w].pb(v);
	}
	dp[1][0]=1;
	for(int t=0;t<k;t++){
		for(int i=1;i<=n;i++){
			for(auto w : G[i]) dp[w][t+1]-=dp[i][t];
			for(int j=1;j<=n;j++){
				if(j!=i) dp[j][t+1]=(dp[j][t+1]+dp[i][t])%mod;
 
			} 
			//cout << dp[i][t] << " ";
		}
		//cout << "\n";
	}
 
	cout << dp[1][k] << "\n";
}

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NSAzIDEwMAoxIDIKNCA1CjIgMwo=

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1 2
4 5
2 3