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.*;

public class C {

  Scanner in = new Scanner(System.in);
  int sols;
  ArrayList<String> possibles = new ArrayList<String>();

  public C() {
    int ncases = in.nextInt();
    for (int i = 0; i < ncases; i++) {
      sols = 0;
      int n = in.nextInt();
      int m = in.nextInt();
      findSolutions(n, m);
      System.out.println("Case #" + (i + 1) + ": " + sols);
      possibles.clear();
    }
  }

  private void findSolutions(int n, int m) {
    while (n < m) {
      findPairs(n, m);
      checkdups();
      possibles.clear();
      n++;
    }
  }

  private void findPairs(int n, int m) {
    String value = Integer.toString(n);
    for (int i = 1; i < value.length(); i++) {
      String nose = value.substring(0, i);
      String ass = value.substring(i, value.length());
      String news = ass.concat(nose);
      compare(value, news, m);
    }
  }

  private void compare(String value, String curvalue, int m) {
    if (Integer.toString(Integer.parseInt(value)).length() == Integer.toString(
        Integer.parseInt(curvalue)).length()) {
      if (Integer.parseInt(curvalue) <= m
          && Integer.parseInt(value) < Integer.parseInt(curvalue)) {
        possibles.add(curvalue);
      }
    }
  }

  private void checkdups() {
    for (int i = 0; i < possibles.size(); i++) {
      for (int x = i + 1; x < possibles.size(); x++) {
        if (possibles.get(i).equals(possibles.get(x))) {
          possibles.remove(x);
        }
      }
    }
    sols += possibles.size();
  }

  public static void main(String[] args) {
    new C();
  }

}
