import java.io.*;
import java.util.*;

/**
 * Created by BoldijarPaul on 31/01/2017.
 */
public class Main {

    public static class Location implements Comparable {
        int x;
        int y;
        double distance;
        int initialIndex;

        Location(int x, int y) {
            this.x = x;
            this.y = y;
        }

        @Override
        public int compareTo(Object o) {
            if (o == null || !(o instanceof Location)) {
                return 0;
            }
            Location location = (Location) o;
            if (distance < location.distance) {
                return -1;
            }
            return 1;
        }
    }

    public static class TestCase {
        Location userLocation;
        TreeSet<Location> stores;
    }

    private static double distance(Location location1, Location location2) {
        return Math.sqrt((location1.x - location2.x) * (location1.x - location2.x) +
                (location1.y - location2.y) * (location1.y - location2.y));
    }

    private static Location locationFromString(String locationString) {
        String[] coords = locationString.split("\\s+");
        return new Location(Integer.valueOf(coords[0]), Integer.valueOf(coords[1]));
    }

    public static void main(String[] args) throws IOException {
        List<TestCase> testCaseList = new ArrayList<>();
        BufferedReader reader = new BufferedReader(new FileReader(new File("task1-test-input.txt")));
        int testCases = Integer.valueOf(reader.readLine());
        reader.readLine();
        for (int i = 1; i <= testCases; i++) {
            TestCase testCase = new TestCase();
            testCase.stores = new TreeSet<>();
            testCase.userLocation = locationFromString(reader.readLine());
            int storesCount = Integer.valueOf(reader.readLine());
            for (int j = 1; j <= storesCount; j++) {
                Location storeLocation = locationFromString(reader.readLine());
                storeLocation.distance = distance(storeLocation, testCase.userLocation);
                storeLocation.initialIndex = j;
                testCase.stores.add(storeLocation);
            }
            testCaseList.add(testCase);
            reader.readLine();
        }
        reader.close();
        outputTestCases(testCaseList);

    }

    private static void outputTestCases(List<TestCase> testCaseList) throws FileNotFoundException, UnsupportedEncodingException {
        PrintWriter printWriter = new PrintWriter("task1-test-output.txt", "UTF-8");
        for (int i = 0, testCaseListSize = testCaseList.size(); i < testCaseListSize; i++) {
            TestCase testCase = testCaseList.get(i);
            Location closestLocation = testCase.stores.first();
            printWriter.println(String.format("Case #%d: %d %.3f", i + 1, closestLocation.initialIndex, closestLocation.distance));
        }
        printWriter.close();
    }
}