N, M = map(int, input().split())
deg = [0] * N
for i in range(M):
    a, b = map(int, input().split())
    deg[a] += 1
    deg[b] += 1
    
S = set(map(int, input().split()))
SS = set()
for i in range(N):
    if deg[i] >= 2:
        SS.add(i)
        
print("Yes") if S != SS else print("No")