import sys
input = sys.stdin.readline
N, K = map(int, input().split())
S = [input().strip() for _ in range(N)]
T = [input().strip() for _ in range(N)]
D = [[] for _ in range(K)]
E = [[] for _ in range(K)]
for i in range(N):
    s = S[i]
    t = T[i]
    D[i%K].append(s)
    E[i%K].append(t)
for i in range(K):
    D[i].sort()
    E[i].sort()
for i in range(K):
    for s, t in zip(D[i], E[i]):
        if s!=t:
            print("No")
            exit()
print("Yes")