import java.util.Comparator;
import java.util.Scanner;
import java.util.stream.Stream;

public class Main{
	static Scanner s=new Scanner(System.in);
	static int getInt(){return Integer.parseInt(s.next());}

	public static void main(String[] $){
		int[]h=new int[3];
		int[]w=new int[3];
		h[0]=getInt();
		w[0]=getInt();
		h[1]=getInt();
		w[1]=getInt();
		h[2]=getInt();
		w[2]=getInt();
		Stream.of('A','B','C')
		.sorted(Comparator.<Character>comparingInt(o->-h[o-'A']).thenComparingInt(o->w[o-'A']))
		.forEach(System.out::println);
	}
}