import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		for (int ti = 0; ti < t; ti++) {
			int a = sc.nextInt(), b = sc.nextInt();
			int sum = 0;
			for (int i = a; i <= b; i++) {
				int numOfDigits, power;
				if (i < 10) {
					numOfDigits = 1;
					power = 1;
				} else if (i < 100) {
					numOfDigits = 2;
					power = 10;
				} else if (i < 1000) {
					numOfDigits = 3;
					power = 100;
				} else if (i < 10000) {
					numOfDigits = 4;
					power = 1000;
				} else if (i < 100000) {
					numOfDigits = 5;
					power = 10000;
				} else if (i < 1000000) {
					numOfDigits = 6;
					power = 100000;
				} else {
					numOfDigits = 7;
					power = 1000000;
				}
				int tmp = i;
				for (int j = 0; j < numOfDigits - 1; j++) {
					int leastSig = tmp % 10;
					tmp = power * leastSig + tmp / 10;
					if (tmp == i)
						break;
					if (leastSig != 0 && tmp < i && tmp >= a)
						sum++;
				}
			}
			System.out.printf("Case #%d: %d%n", ti + 1, sum);
		}
	}
}
