using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
Regex expr = new Regex(@"\Gab");
Console.WriteLine(expr.Match("ababab", 1)?.Success);
Regex expr2 = new Regex(@"\Gab");
Console.WriteLine(expr2.Match("ababab", 2)?.Success);
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uQ29sbGVjdGlvbnMuR2VuZXJpYzsKdXNpbmcgU3lzdGVtLklPOwp1c2luZyBTeXN0ZW0uTGlucTsKdXNpbmcgU3lzdGVtLlRleHQuUmVndWxhckV4cHJlc3Npb25zOwoKcHVibGljIGNsYXNzIFRlc3QKewoJcHVibGljIHN0YXRpYyB2b2lkIE1haW4oKQoJewoJCVJlZ2V4IGV4cHIgPSBuZXcgUmVnZXgoQCJcR2FiIik7CiAgICAJQ29uc29sZS5Xcml0ZUxpbmUoZXhwci5NYXRjaCgiYWJhYmFiIiwgMSk/LlN1Y2Nlc3MpOwogICAgCQogICAgCVJlZ2V4IGV4cHIyID0gbmV3IFJlZ2V4KEAiXEdhYiIpOwogICAgCUNvbnNvbGUuV3JpdGVMaW5lKGV4cHIyLk1hdGNoKCJhYmFiYWIiLCAyKT8uU3VjY2Vzcyk7Cgl9Cn0=