N = int(input())
S = input()
T = input()
if S == T:
    print("Yes")
    exit()

from collections import defaultdict
dic = defaultdict(int)
for i in range(N):
    if S[i] > T[i]:
        print("No")
        exit()
    elif S[i] < T[i]:
        dic[(S[i],T[i])] += 1
if dic[('A','B')] == 0:
    print("No")
    exit()
if dic[('A','B')] != dic[('B','C')]:
    print("No")
    exit()
print("Yes")