namespace AtCoder;

#nullable enable

using System.Numerics;

static class Extensions
{
    public static T[] Repeat<T>(this int time, Func<T> F) => Enumerable.Range(0, time).Select(_ => F()).ToArray();

    public static int ToFlag(this int i)
    {
        if (i < 0 || 31 <= i) throw new IndexOutOfRangeException();
        return 1 << i;
    }
    public static bool OfFlag(this int value, int i) => (value & ToFlag(i)) > 0;
    public static int WithFlag(this int value, int i, bool f) => f ? (value | ToFlag(i)) : (value & ~ToFlag(i));

}

class AtCoder
{
    object? Solve()
    {
        var n = Int();
        var m = Int();
        var k = Int();
        var xz = k.Repeat(() => Int() - 1);
        var edges = m.Repeat(() => (Int() - 1, Int() - 1));
        var adjz = new bool[n, n];
        foreach (var (u, v) in edges) adjz[u, v] = adjz[v, u] = true;

        var dz = new bool[n, n, n];
        for (var i = 0; i < n; i++) dz[i, i, 0] = true;
        for (var s = 0; s < n; s++)
        {
            var sf = s.ToFlag();
            var memo = new bool[n.ToFlag(), n];
            memo[sf, s] = true;
            void S(int v, int visited, int l)
            {
                for (var i = 0; i < n; i++)
                {
                    if (visited.OfFlag(i) || !adjz[v, i]) continue;
                    var nv = visited.WithFlag(i, true);
                    if (memo[nv, i]) continue;
                    memo[nv, i] = true;
                    dz[s, i, l + 1] = true;
                    S(i, nv, l + 1);
                }
            }
            S(s, sf, 0);
        }
        for (var i = 0; i < n; i++) for (var d = 0; d < n; d++)
        {
            var f = true;
            foreach (var x in xz) f &= dz[i, x, d];
            if (f) return true;
        }
        return false;
    }

    public static void Main() => new AtCoder().Run();
    public void Run()
    {
        var res = Solve();
        if (res != null)
        {
            if (res is bool yes) res = yes ? "Yes" : "No";
            sw.WriteLine(res);
        }
        sw.Flush();
    }

    string[] input = Array.Empty<string>();
    int iter = 0;
    readonly StreamWriter sw = new(Console.OpenStandardOutput()) { AutoFlush = false };

    string String()
    {
        while (iter >= input.Length) (input, iter) = (Console.ReadLine()!.Split(' '), 0);
        return input[iter++];
    }
    T Input<T>() where T : IParsable<T> => T.Parse(String(), null);
    int Int() => Input<int>();
    void Out(object? x, string? separator = null)
    {
        separator ??= Environment.NewLine;
        if (x is System.Collections.IEnumerable obj and not string)
        {
            var firstLine = true;
            foreach (var item in obj)
            {
                if (!firstLine) sw.Write(separator);
                firstLine = false;
                sw.Write(item);
            }
        }
        else sw.Write(x);
        sw.WriteLine();
    }
}