from collections import defaultdict

def can_sort(N, K, S, T):
    s_groups = defaultdict(list)
    t_groups = defaultdict(list)

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

    for r in range(K):
        if sorted(s_groups[r]) != sorted(t_groups[r]):
            return "No"
    return "Yes"

# 入力処理
N, K = map(int, input().split())
S = [input().strip() for _ in range(N)]
T = [input().strip() for _ in range(N)]

print(can_sort(N, K, S, T))