[Python3] one-liner
\nclass Solution:\n    def divideString(self, s, k, fill):\n        return [s[i:i+k]+fill*(k+i-len(s)) for i in range(0, len(s), k)]\n
```\nclass Solution:\n    def divideString(self, s, k, fill):\n        return [s[i:i+k]+fill*(k+i-len(s)) for i in range(0, len(s), k)]\n```
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