using System;
using System.Text.RegularExpressions;
 
public class Test
{
	public static void Main()
	{
        var re = new Regex(@"\b[аеоиуюэяёы][а-яё][аеоиуюэяёы]\b",
                           RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
		string input;
		while ((input = Console.ReadLine()) != null)
		{
			Console.WriteLine($"Input line: {input}");
            foreach (Match match in re.Matches(input))
                Console.WriteLine($"  --> match at index {match.Index}, length {match.Length}, text {match.Value}");
		}
	}
}

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

0LDQs9CwCtC+0LPQvgrQvdC10YIK0YLRgNC4CtGH0LXRgtGL0YDQtQpxd2UK0LDQs9CwINC+0LPQviDRg9Cz0YMg0YXRgNGOINCz0LDQsiDQvNGP0YMg0YLQv9GA0YMg0L3QviDRi9GL0Ys=

ага
ого
нет
три
четыре
qwe
ага ого угу хрю гав мяу тпру но ыыы