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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author harit
 */
public class Main {

    public static void main(String[] args) throws IOException {
        
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int t = Integer.parseInt(br.readLine());
        int t1 = 1;
        int a, b;
        int count = 0;
        while (t1 <= t) {
            String s[] = br.readLine().split(" ");
            a = Integer.parseInt(s[0]);
            b = Integer.parseInt(s[1]);
            count=0;
            for (int i = a; i < b; i++) {
                List<Integer> lstR = getRnum(i);
                for (Integer j : lstR) {
                    if (j >= i && j <= b) {
                        count++;
                    }
                }

            }
            System.out.println("Case #"+ t1 + ": " + count);
            t1++;
        }

    }

    public static List<Integer> getRnum(int a) {
        List<Integer> lstRnum = new ArrayList<Integer>();
        String s = "" + a;
        int l = s.length();
        int modf = 10;
        int multf = (int) Math.pow(10, l - 1);
        int i = 1;
        boolean flag=true;
        while (i < l) {
            // System.out.println("modf "+modf);
            int x = ((a % modf) * multf) + a / modf;
            if (("" + x).length() == l && x!=a) {
                for(int xx:lstRnum){ if(xx==x) flag=false;}
                if(flag){
                    lstRnum.add(x);
                    
                }
                
            }
            modf = modf * 10;
            multf = multf / 10;
            i++;
        }

        return lstRnum;
    }
}
