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.HashSet;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Formatter;
import java.util.Scanner;
import static java.lang.Math.*;
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author milen.chechev
 */
public class RecycledNumbers {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws FileNotFoundException {
        Scanner in = new Scanner(new File("input.txt"));
        Formatter out = new Formatter(new File("output.txt"));

        int t = in.nextInt();
        for(int k = 0; k < t ; k++){
            int a = in.nextInt();
            int b = in.nextInt();
            int digits = numberOfDigits(b);
            int accum = 0;
            for(int i = a ; i < b ; i++){
                int number = i;
                HashSet<Integer> visited = new HashSet<Integer>();
                for(int j = 1 ; j < digits; j++){                 
                    number = number/ 10 + (int)pow(10,digits-1)*(number%10);
                    if(number > i && number <= b && !visited.contains(number)){
                        accum++;
                        visited.add(number);
                    }
                }
            }
            out.format("Case #%d: %d\n",k+1,accum);
        }
        out.close();
    }
    public static int numberOfDigits(int number){
        int res = 0;
        while(number > 0){
            res++;
            number /=10;
        }
        return res;
    }

}
