a = 0
b = 0
c = 0
for i in range(len(ss)):
    if s[i] == ss[i]:
        continue
    else:
        a = i
        break
else:
    print('YES')
    exit()


sss = ss[a:]
print(sss)
for i in range(len(sss)):
    if sss[len(sss)-i-1] == s[len(s)-i-1]:
        continue
    else:
        print('NO')
        break
else:
    print('YES')
    