#include <bits/stdc++.h>

int main() {
    std::cin.tie(nullptr)->sync_with_stdio(false);
    int n, m, k;
    std::cin >> n >> m >> k;
    std::vector<int> a(k);
    for (auto &x : a) std::cin >> x, --x;
    std::vector<std::vector<int>> g(n);
    for (int i = 0; i < m; ++i) {
        int u, v;
        std::cin >> u >> v, --u, --v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    constexpr int N = 15;
    int d[N][N]{};

    for (int i = 0; i < k; ++i) {
        std::vector<int> st(n);
        auto dfs = [&](auto &dfs, int u, int step)->void {
            st[u] = 1;
            d[step][u] |= 1 << i;
            for (auto &v : g[u])
                if (!st[v]) dfs(dfs, v, step + 1);
            st[u] = 0;
        };
        dfs(dfs, a[i], 0);
    }
    int res = 0;
    for (int i = 0; i < n; ++i)
        for (int j = 0; j < n; ++j)
                res|= (d[i][j] == (1 << k) - 1);
    std::cout << (res ? "Yes" : "No") << '\n';
    return 0;
}