Python - simple one liner
\nclass Solution:\n    def countConsistentStrings(self, allowed: str, words: List[str]) -> int:\n        return sum(set(allowed) >= set(i) for i in words)\n\nEx
```\nclass Solution:\n    def countConsistentStrings(self, allowed: str, words: List[str]) -> int:\n        return sum(set(allowed) >= set(i) for i in words)\n```\nExplanation:\n* ```set(allowed) >= set(i)``` all characters in ```i``` are also in ```allowed```
['Ordered Set', 'Python3']