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 st = String::new();
        std::io::stdin().read_line(&mut st).ok();
        let st: Vec<usize> = st.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
        let s = st[0];
        let t = st[1];
        paths[s].push(t);
        paths[t].push(s);
    }

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