public static void Main()
Console.WriteLine("a=21, b=10");
Console.WriteLine(a > b);
Console.WriteLine(a < b);
Console.WriteLine(a == b);
Console.WriteLine(a != b);
Console.WriteLine(a >= b);
Console.WriteLine(a <= b);
Console.WriteLine ("a=12, b=12");
Console.WriteLine(a > b);
Console.WriteLine(a < b);
Console.WriteLine(a == b);
Console.WriteLine(a != b);
Console.WriteLine(a >= b);
Console.WriteLine(a <= b);