import java.io.File;
import java.io.FileNotFoundException;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
	
	public static DecimalFormat df = new DecimalFormat("0.00");
	
	public static ArrayList getLength(int x1, int y1, int x2, int y2, int r) {
		ArrayList lr = new ArrayList();
		double sin0 = 0;
		double cos0 = 0;
		double d = Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
		try {
			sin0 = (x1 - x2) / d;
		} catch (ArithmeticException e) {
			sin0 = 0;
		}
		double sin1 = r / d;
		try {
			cos0 = (y1 - y2) / d;
		} catch (ArithmeticException e) {
			cos0 = 1;
		}
		double cos1 = Math.sqrt(1 - (r * r / (d * d)));
		lr.add(x1
				- (y1 * ((sin0 * cos1 + sin1 * cos0) / (cos0 * cos1 - sin0
						* sin1))));
		lr.add(x1
				- (y1 * ((sin0 * cos1 - sin1 * cos0) / (cos0 * cos1 + sin0
						* sin1))));
		return lr;
	}

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while (true) {
			ArrayList containers = new ArrayList();
			String s = sc.nextLine();
			String[] d = s.split(" ");
			ArrayList al = new ArrayList();
			if (Integer.parseInt(d[0]) != 0) {
				for (int i = 0; i <= Integer.parseInt(d[0]); i++) {
					al.add(sc.nextLine());
				}
				for (int i = 1; i <= Integer.parseInt(d[0]); i++) {
					containers
							.add(getLength(
									Integer.parseInt(al.get(0).toString()
											.split(" ")[0]),
									Integer.parseInt(al.get(0).toString()
											.split(" ")[1]),
									Integer.parseInt(al.get(i).toString()
											.split(" ")[0]),
									Integer.parseInt(al.get(i).toString()
											.split(" ")[1]),
									Integer.parseInt(al.get(i).toString()
											.split(" ")[2])));
				}
				double[] container1 = new double[2 * containers.size()];
				ArrayList container2 = new ArrayList();
				int k = 0;
				for (int i = 0; i < containers.size(); i++) {
					container1[k] = (Double) (((ArrayList) containers.get(i))
							.get(0));
					 container1[k + 1] = (Double) (((ArrayList) containers.get(i))
							.get(1));
					k += 2;
				}
				for (int i = 0; i<containers.size(); i++) {
					container2.add((Double)((ArrayList) containers.get(i)).get(1));
				}
				Arrays.sort(container1);
				int I = -1;
				while (I < container1.length - 1) {
					I = I + 1;
					System.out.print(df.format(container1[I]) + " ");
					if (container2.contains(container1[I + 1])) {
						I = I + 1;
						System.out.println(df.format(container1[I]));
					} else {
						I = I + 1;
						do {
							I = I + 2;
						} while (!container2.contains(container1[I]));
						System.out.println(df.format(container1[I]));
					}
				}
				System.out.println();
			} else if (Integer.parseInt(d[0]) == 0) {
				break;
			}
		}
	}
}