Audit the Vowel Density

Basic

A text-analytics step scores how "pronounceable" a token is by counting its vowels. Build the counter it relies on.

Implement `solve(String input)` (lowercase) to return the number of vowels (a, e, i, o, u) it contains.

Examples

Input"salesforce"

Output4

Input"rhythm"

Output0

Hints

Build a Set of vowel characters and check membership while looping characters.

Anonymous Apex

Integer solve(String input) {
    // count the vowels in input
    return null;
}

Your code runs in a secure sandbox against multiple hidden test cases. The problem is solved only when every test passes. Each run is isolated and any data changes are rolled back automatically. Keyboard users: press Esc then Tab to move focus out of the editor.