using System;
public class Test
{
public static void Main()
{
double a;
double b;
double hilf = 0 ;
a = double.Parse(Console.ReadLine());
b = double.Parse(Console.ReadLine());
Console.WriteLine("a b hilf");
Console.WriteLine("{0} {1} {2}", a, b, hilf);
hilf = a;
Console.WriteLine("{0} {1} {2}", a, b, hilf);
a = b;
Console.WriteLine("{0} {1} {2}", a, b, hilf);
b = hilf;
Console.WriteLine("{0} {1} {2}", a, b, hilf);
}
}
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