#line 1 "main.cpp"
#include <bits/stdc++.h>
#include <atcoder/all>
// #include "library/templates/template.cpp"
using namespace atcoder;
using namespace std;
using ll = long long int;
using ull = unsigned long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

using mint = modint998244353;
long long solve(int N, int T, const vector<vector<int>> &g)
{
    vector<mint> dp(N, 0);
    dp[0] = 1;
    for (int t = 0; t < T; t++)
    {
        vector<mint> nxtdp(N, 0);
        for (int x = 0; x < N; x++)
        {
            // nxtdp[x] += dp[x];
            for (int y : g[x])
            {
                nxtdp[x] += dp[y];
            }
        }
        swap(dp, nxtdp);
    }
    return dp[0].val();
}

int main()
{
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    std::cout.tie(nullptr);

    int N, M, T;
    std::cin >> N >> M >> T;
    vector<vector<int>> g(N);
    for (int i = 0; i < M; ++i)
    {
        int u, v;
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    auto ans = solve(N, T, g);
    std::cout << ans << '\n';
    return 0;
}