using System.Collections.Generic;
using System;

public class Hello
{
    public static int MOD = 998244353;
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var m = int.Parse(line[1]);
        var t = int.Parse(line[2]);
        var aa = new List<int>[n];
        for (int i = 0; i < n; i++) aa[i] = new List<int>();
        for (int i = 0; i < m; i++)
        {
            line = Console.ReadLine().Trim().Split(' ');
            var a = int.Parse(line[0]);
            var b = int.Parse(line[1]);
            aa[a].Add(b);
            aa[b].Add(a);
        }
        getAns(n, t, aa);
    }
    static void getAns(int n, int t, List<int>[] aa)
    {
        var dp = new long[t + 1, n];
        dp[0, 0] = 1;
        for (int i = 1; i <= t; i++)
            for (int j = 0; j < n; j++)
                foreach (var x in aa[j])
                {
                    dp[i, j] += dp[i - 1, x];
                    dp[i, j] %= MOD;
                }
        Console.WriteLine(dp[t, 0]);
    }
}