Count the Vowels

Given a string consisting solely of lowercase English letters, count the number of vowels in the string. Vowels are defined as \(a, e, i, o, u\). Your task is to output the count of vowels present in the input string.

inputFormat

The input consists of a single line containing a string \(s\) that only includes lowercase English letters. The length of \(s\) satisfies \(0 \le |s| \le 10^5\).

outputFormat

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

hello

2