static void Main(string[] args)
Console.WriteLine("Enter a:");
int a = int.Parse(Console.ReadLine());
Console.WriteLine("Enter b:");
int b = int.Parse(Console.ReadLine());
Console.WriteLine($"First number: {a}");
Console.WriteLine($"Second number: {b}");
Console.WriteLine($"First number: {a}");
Console.WriteLine($"Second number: {b}");