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 lines = Vec::with_capacity(m);
    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];
        lines.push((u, v));
    }

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