u = 0
N,K = input().split()
N = int(N)
K = int(K)

S = [input() for i in range(N)]
T = [input() for i in range(N)]

m = []
for i in range(0,N):
    m.append(T.index(S[i]))

for i in range(0,N):
    if (m[i] - i) % K != 0:
        print("No")
        u = 1
        break
if u == 0:
    print("Yes")