https://leetcode.com/problems/permutation-in-string/

Time Limit Exceeded

```
from itertools import permutations

class Solution:
    def checkInclusion(self, s1: str, s2: str) -> bool:
        #4:28
        for s in [''.join(p) for p in permutations(s1)]:
            if s in s2:
                return True
        return False
        #4:29
```
