import java.util.Scanner;
import java.text.DecimalFormat;

class work_5
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);

		String myName = input.nextLine();
		double myScore = input.nextDouble();
		String dummy = input.nextLine();
		String oneName = input.nextLine();
		double oneScore = input.nextDouble();

		System.out.println(myName+"\n"+oneName+"\n"+(oneScore+myScore)/2.);
	}
}