#55462: python 簡單解
hges10914@gapp.hcc.edu.tw
(勞贖能吃嗎)
a = input()
b = a[-1::-1]
if a==b:
print('yes')
else:
print('no')
a = input()
b = a[-1::-1]
if a==b:
print('yes')
else:
print('no')