N,M=map(int,input().split())
M2=M*2
ij=[0]*M2
for m in range(M):
	ij[m]=list(map(int,input().split()))
	ij[m+M]=ij[m][::-1]
vertex_exception=set(map(int,input().split()))
for m0 in range(M2):
	for m1 in range(M2):
		#辺3本の全探索
		for m2 in range(M2):
			v=[m0,m1,m2]
			#3本が閉路をなすか判定
			if [ij[m][1]for m in v]==[ij[m][0]for m in v[1:]+[m0]]:
				#頂点が例外でないか判定
				if {ij[m][0]for m in v}!=vertex_exception:print("Yes"),exit()
				continue
			#辺4本の全探索
			for m3 in range(M2):
				v=[m0,m1,m2,m3]
				#4本が閉路をなすか判定
				if [ij[m][1]for m in v]==[ij[m][0]for m in v[1:]+[m0]] and len({m%M for m in v})==4 and len({ij[m][0]for m in v})==4:print("Yes"),exit()
print("No")