import java.util.Scanner;

public class No1749 {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		int M = scan.nextInt();
		int T = scan.nextInt();
		int MOD = 998244353;
		int[][] v = new int[N][2];
		boolean[][] r = new boolean[N][N];
		for (int i=0; i < M; i++) {
			int s = scan.nextInt();
			int t = scan.nextInt();
			r[s][t] = true;
			r[t][s] = true;
		}
		v[0][0] = 1;
		for (int t=0; t < T; t++) {
			for (int i=0; i < N; i++) {
				v[i][(t+1) % 2] = 0;
				for (int j=0; j < N; j++) {
					if (r[i][j]) {
						v[i][(t+1) % 2] = (v[i][(t+1) % 2] + v[j][t % 2]) % MOD;
					}
				}
			}
		}
		System.out.println(v[0][T % 2]);
	}

}