using System;
public class Program
{
public static void Main()
Console.WriteLine("Hello World");
}
//https://edabit.com/challenge/5ytLyHsZHfyDhBgXr
public static int CountVowels(string str)
int count = 0;
foreach(char letter in str)
if(letter.Equals('a') || letter.Equals('e') || letter.Equals('i')|| letter.Equals('o')|| letter.Equals('u'))
count++;
return count;