from collections import defaultdict, Counter

def can_align(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 Counter(S_groups[r]) != Counter(T_groups[r]):
            return "No"
    return "Yes"

# Input handling
def main():
    import sys
    input = sys.stdin.read
    data = input().splitlines()
    
    N, K = map(int, data[0].split())
    S = data[1:N+1]
    T = data[N+1:N+1+N]
    
    result = can_align(N, K, S, T)
    print(result)

main()