using System;
public class Test
{
public static void Main()
{
string text = "My car is nice";
Console.Out.WriteLine(text.Substring(1,1));
Console.Out.WriteLine(text.Substring(6,1));
Console.Out.WriteLine(text.Substring(1,4).Replace('c','a'));
Console.Out.WriteLine(text.Substring(1,10).Replace('a','b').Replace(' ','t')); }
}
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