the solution is: def ispalindromes(s): return s==s[::-1]

def palindromeIndex(s): n=len(s) if ispalindromes(s): return -1

for i in range(n//2):
    if s[i]!=s[n-i-1]:
        if ispalindromes(s[:1]+s[i+1:]):
            return i
        else:
            return n-i-1
return -1