Vowels Count

using System;
class Program
{
    static void Main(string[] args)
    {
        string vow = Console.ReadLine().ToLower();
        GetVowels(vow);
    }
    public static void GetVowels(string st)
    {
        int count = 0;
        for (int i = 0; i < st.Length; i++)
        {
            if(st[i]=='a'|| st[i]=='e'|| st[i]=='i' || st[i]=='o'|| st[i]=='u')
            {
                count++;
            }
        }
        Console.WriteLine(count);

    }
}