def dfs(v, d):
    dist[v].add(d)
    for nv in G[v]:
        if seen[nv]==1:
            continue
        seen[nv] = 1
        dfs(nv, d+1)
        seen[nv] = 0
    #print(dist)

import sys
input = sys.stdin.readline
N, M, K = map(int, input().split())
X = list(map(int, input().split()))
G = [[] for _ in range(N)]
for _ in range(M):
    u, v = map(int, input().split())
    u-=1
    v-=1
    G[u].append(v)
    G[v].append(u)
for i in range(K):
    X[i]-=1
for i in range(N):
    dist = [set() for _ in range(N)]
    seen = [0 for _ in range(N)]
    seen[i] = 1
    dfs(i, 0)
    tmp = dist[X[0]]
    for j in range(1, K):
        tmp &= dist[X[j]]
    if len(tmp)>0:
        print("Yes")
        exit()
print("No")