const MOD: usize = 998244353;

fn main() {
    let mut nmt = String::new();
    std::io::stdin().read_line(&mut nmt).ok();
    let nmt: Vec<usize> = nmt.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nmt[0];
    let m = nmt[1];
    let t = nmt[2];
    let mut paths = vec![vec![]; n];
    for _ in 0..m {
        let mut temp = String::new();
        std::io::stdin().read_line(&mut temp).ok();
        let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
        let u = temp[0];
        let v = temp[1];
        paths[u].push(v);
        paths[v].push(u);
    }

    let mut dp = vec![vec![0usize; n]; t+1];
    dp[0][0] = 1;
    for i in 0..t {
        for u in 0..n {
            if dp[i][u] == 0 { continue; }
            for &v in paths[u].iter() {
                dp[i+1][v] += dp[i][u];
                dp[i+1][v] %= MOD;
            }
        }
    }
    println!("{}", dp[t][0]);
}