n,k=map(int,input().split())
s=[input() for _ in range(n)]
t=[input() for _ in range(n)]
for i in range(n):
    index=t.index(s[i])
    if (index-i)%k!=0:
        print('NO')
        exit()
    while i<index:
        t[index],t[index-k]=t[index-k],t[index]
        index-=k
print('Yes')