use proconio::input;
use proconio::marker::Usize1;

fn main() {
    input! {
        n : usize,
        m : usize,
        k : usize,
        x : [Usize1; k],
        edges : [(Usize1, Usize1); m]
    }

    let mut g = vec![vec![]; n];
    for (u, v) in edges {
        g[u].push(v);
        g[v].push(u);
    }

    let mut dp = vec![0; k];
    for (i, &x) in x.iter().enumerate() {
        dp[i] |= 1 << x;
    }

    let mut ok = dp.iter().fold(!0, |acc, &x| acc & x) > 0;
    for _ in 0..n {
        let mut next = vec![0; k];
        for (i, &x) in x.iter().enumerate() {
            for j in 0..n {
                if dp[i] >> j & 1 == 0 { continue; }
                for &k in g[j].iter() {
                    next[i] |= 1 << k;
                }
            }
        }
        dp = next;
        ok |= dp.iter().fold(!0, |acc, &x| acc & x) > 0;
    }


    println!("{}", if ok { "Yes" } else { "No" })
}