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="hello"
print(s)
print("%s"%s)
print("{}".format(s))
for c in s:
    print(c,end='')
    print("\n")

for i in range(1,10,2):
    print(i)

a=5
b=7
a,b=b,a
print("a=%d,b=%d"%(a,b))
print("a={},b={}".format(a,b))
print(input()[::-1])

s="hello"
s='y'+s[1:]+'w'
print(s)
dir(s)
"""
s=input()
if s==s[::-1]:
    print("YES")
else:
    print("NO")


