#include<bits/stdc++.h>
#define ll long long
#define rep(i,n) for(ll i=0;i<(n);++i)
#define reps(i,n) for(ll i=1;i<=(n);++i)
#define repr(i,n) for(ll i=2;i*i<=(n);++i)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((string)(x).size())
#define pb push_back
#define pob pop_back()
#define MMod (ll)1000000007
#define mmod (ll)998244353
#define setp(x) setprecision((ll)(x))
#define INF (ll)(1000000000000000000)
using namespace std;
using vi=vector<int>;
using vc=vector<char>;
using vb=vector<bool>;
using vl=vector<long long>;
using vvi=vector<vi>;
using vvl=vector<vl>;
using vvc=vector<vc>;
using vvb=vector<vb>;
using vpi=vector<pair<int,int>>;
using vpl=vector<pair<ll,ll>>;
using vs=vector<string>;
using pii=pair<int, int>;
using pll=pair<ll,ll>;
using pqi=priority_queue<int>;

int main(){
  int n,m,t; cin>>n>>m>>t;
  vvi p(n+1);
  rep(i,m){
    int a,b; cin>>a>>b;
    p[a].pb(b);
    p[b].pb(a);
  }
  vvl inf(t+1,vl(n,0));
  inf[0][0]=1;
  reps(i,t){
    rep(j,n){
      for(int k:p[j]){
        inf[i][j]+=inf[i-1][k];
        inf[i][j]%=mmod;
      }
    }
  }
  cout<<inf[t][0]<<endl;
  return 0;
}