static void Main()
{
var r1 = new Regex1();
var m1 = r1.Match("7");
var m2 = r1.Match("1");
var m3 = r1.Match("sfjslkfjsklf", 3);
var m4 = r1.Match("áíščřáí ěšrui564564564šš", 4, 8);
var ms1 = r1.Matches("aaaa");
var ms2 = r1.Matches("aaaa", 0);
var r2 = new R2D2();
var rm1 = r2.Match("01/1/1990");
Console.WriteLine($"{rm1.Year}-{rm1.Month}-{rm1.Day}");
var rm2 = r2.Match("a01/1/1990", 1);
var rm3 = r2.Match("a01/1/1990b", 1, 9);
var rms1 = r2.Matches("01/1/199006/06/8741");
var rms2 = r2.Matches("a01/1/1990ř06/06/8741Ň", 1);
Console.WriteLine(rms2.Skip(1).First().Year);
}
