0ms||100%||C++ Solution||O(1) Time Complexity
\nclass Solution {\npublic:\n    int countVowelStrings(int n) {\n        return (n+1)*(n+2)*(n+3)*(n+4)/24;\n    }\n};\n\n\n\nplease upvote!!!
```\nclass Solution {\npublic:\n    int countVowelStrings(int n) {\n        return (n+1)*(n+2)*(n+3)*(n+4)/24;\n    }\n};\n```\n\n\nplease upvote!!!
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