from collections import Counter

def can_rearrange(N, K, S, T):
    groups_S = [[] for _ in range(K)]
    groups_T = [[] for _ in range(K)]
    
    for i in range(N):
        groups_S[i % K].append(S[i])
        groups_T[i % K].append(T[i])
    
    for s_group, t_group in zip(groups_S, groups_T):
        if Counter(s_group) != Counter(t_group):
            return "No"
    return "Yes"

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

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