N,K = map(int,input().split())
A = N//K
B = N%K
S = []
T = []
ans = "Yes"
for i in range(K):
	S.append([])
for i in range(K):
	T.append([])
ans = "Yes"
for i in range(A):
	for j in range(K):
		S[j].append(input())
for i in range(B):
	S[i].append(input())
for i in range(K):
	S[i].sort()
for i in range(A):
	for j in range(K):
		T[j].append(input())
for i in range(B):
	T[i].append(input())
for i in range(K):
	T[i].sort()
for i in range(K):
	if S[i] != T[i]:
		ans = "No"
print(ans)