import sys
input = sys.stdin.readline

N,M,K=map(int,input().split())
X=list(map(int,input().split()))

for i in range(K):
    X[i]-=1

E=[[] for i in range(N)]

for i in range(M):
    u,v=map(int,input().split())
    u-=1
    v-=1
    E[u].append(v)
    E[v].append(u)

def calc(x):
    LIST=[set() for i in range(N)]
    LIST[0].add(x)
    Q=[(x,1<<x,0)]
    USE=set((x,1<<x,0))

    while Q:
        now,hist,kai=Q.pop()

        for to in E[now]:
            if hist & (1<<to) == 0:
                hist2=hist|(1<<to)
                LIST[kai+1].add(to)
                necq=(to,hist2,kai+1)
                USE.add(necq)
                Q.append(necq)

    return LIST


LIST=[set(range(N)) for i in range(N)]

for x in X:
    L=calc(x)

    for i in range(N):
        LIST[i]&=L[i]

for i in range(N):
    if len(LIST[i])>0:
        print("Yes")
        exit()

print("No")