The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pronounced) reversely. For example, a Berlandish word code corresponds to a Birlandish word edoc. However, it's easy to make a mistake during the «translation». Vasya translated word *s* from Berlandish into Birlandish as *t*. Help him: find out if he translated the word correctly.
The first line contains word *s*, the second line contains word *t*. The words consist of lowercase Latin letters. The input data do not consist unnecessary spaces. The words are not empty and their lengths do not exceed 100 symbols.
s = input()
t = input()
char = [0]*26
for i in s:
    char[ord(i)-97] += 1
same = 0
pr = 0
if s == t:  
    for i in char:
        if i>1:
            same = 1
    if same == 0:
        print("NO")
        pr = 1
found = 0
for i in t:
    char[ord(i)-97] -= 1
for i in char:
    if i != 0:
        found = 1
        break
if found == 0 and pr == 0:
    print("YES")
else:
    print("NO")