def can_transform(S, T):
    for i in range(len(S)):
        if S[i] > T[i] or (S[i] == 'A' and T[i] == 'C'):
            return "No"
        S = S[:i] + S[i:].replace(S[i], T[i])
    return "Yes" if S == T else "No"

N = int(input().strip())
S = input().strip()
T = input().strip()

print(can_transform(S, T))