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.
def chaine(ch):
    test=True
    for i in range(len(ch)):
        if not("a"<=ch[i]<="z"):
            test=False
    return ch!="" and len(ch)<=100  and test
def saisie():
    ch=input()
    while not chaine(ch):
        ch=input()
    return ch
def inv(ch):
    ch1=""
    for i in range(len(ch)):
        ch1=ch1+ch[len(ch)-i-1]        
    return ch1
def aff():
    ch=saisie()
    ch1=input()
    if ch1==inv(ch):
        print("Oui")
    else:
        print("Non")

aff()  