Count Lowercase Vowels

You are given a string and you need to determine the number of lowercase vowels present in the string. The vowels considered are \(a, e, i, o, u\). Uppercase letters are not counted. For example, given the input hello, the output is 2 because the vowels e and o appear in the string.

You must read from standard input (stdin) and output your result to standard output (stdout).

inputFormat

The input consists of a single line containing a string \(s\). The string may include alphabetic characters, digits, and symbols.

Example: hello

outputFormat

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

Example: given the input hello, output 2.

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