Clean Python 3 three lines
\nclass Solution:\n    def breakPalindrome(self, palindrome: str) -> str:\n        for i in range(len(palindrome) // 2):\n            if palindrome[i] != \'a\':
```\nclass Solution:\n    def breakPalindrome(self, palindrome: str) -> str:\n        for i in range(len(palindrome) // 2):\n            if palindrome[i] != \'a\': return palindrome[:i] + \'a\' + palindrome[i+1:]\n        return \'\' if len(palindrome) == 1 else palindrome[:-1] + \'b\'\n```
['Greedy', 'Python3']