Count the Vowels

Your task is to count the number of vowels in a given string. The string can contain uppercase letters, lowercase letters, and spaces. Vowels in this problem are defined as: \(a, e, i, o, u\) in both cases.

Constraints:

• The length of the input string is between 0 and \(10^5\) inclusive.

Examples:

Input: Hello World
Output: 3
Input: algorithms are fun
Output: 6
Input: bcdfghjklmnpqrstvwxyz
Output: 0

</p>

inputFormat

The input consists of a single line containing a string \(s\). The string may include uppercase letters, lowercase letters, and spaces.

outputFormat

Output a single integer representing the number of vowels in the input string.

## sample

Hello World

3