public static class Test
{
	public static bool Run()
	{
		string s = "barek";
		string() s1 = $"^{s.Substring(1, 3)}$"; //FAIL: cl
		const byte[4] b = { 'f', 'o', 'o', 'b' };
		string() s2 = $"^{Encoding.UTF8.GetString(b, 1, 2), 3}$";
		return s1 == "^are$" && s2 == "^ oo$";
	}
}