N,K=map(int,input().split())
S=[input().strip() for i in range(N)]
T=[input().strip() for i in range(N)]

XS=[[] for i in range(K)]
XT=[[] for i in range(K)]

for i in range(N):
    XS[i%K].append(S[i])
    XT[i%K].append(T[i])

flag=1

for i in range(K):
    if sorted(XS[i])==sorted(XT[i]):
        pass
    else:
        flag=0

if flag:
    print("Yes")
else:
    print("No")