using uCalcSoftware;

var uc = new uCalc();
var t = uc.NewTransformer();
t.Text = "aaa bbb xyz 123";
var aaa = t.FromTo("aaa", "111");
var xyz = t.Pattern("xyz");
t.Filter();
Console.WriteLine(t.Matches.Text);

Console.WriteLine("-----");
Console.WriteLine(aaa.Replacement);
Console.WriteLine(xyz.Replacement);