n, k = map(int, input().split())

s = [input() for i in range(n)]
t = [input() for i in range(n)]

res = True
for i in range(k):
	res = res and sorted(s[j] for j in range(i, n, k)) == sorted(t[j] for j in range(i, n, k))

print("Yes" if res else "No")