import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

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

from collections import defaultdict

d = defaultdict(int)
for i in range(n):
    d[s[i]] = i

for i in range(n):
    t[i] = d[t[i]]

for i in range(k):
    if not sorted([t[j] for j in range(i, n, k)]) == list(range(i, n, k)):
        No()
        break
else:
    Yes()