02. Vowels Count

using System;

namespace VowelsCount
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine().ToLower();
            int vowels = 0;

            Console.WriteLine(PrintNumOfVowel(input, vowels));
        }

        static int PrintNumOfVowel(string input,int vowels)
        {
            for (int i = 0; i < input.Length; i++)
            {

                int current = input[i];
                if (current == 97 || current == 101 || current == 105 || current == 111 || current == 117 || current == 121)
                {
                    vowels++;
                }
            }
            return vowels;
        }
    }
}