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

import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

/**
 *
 * @author imgps
 */
public class C {
    public static void main(String args[]) throws Exception{
        int A,B;
        int ctr = 0;
        int testCases;
        
        Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in "));
        testCases = sc.nextInt();
        int input[][] = new int[testCases][2];
        for(int i=0;i<testCases;i++)
        {
          //  System.out.print("Enter input A B: ");
            input[i][0] = sc.nextInt();
            input[i][1] = sc.nextInt();
            
        }
  

for(int k=0;k<testCases;k++){
      ctr = 0;
      A = input[k][0];
      B = input[k][1];
        for(int i = A;i<=B;i++){
            int num = i;
            int nMul = 1;
            int mul = 1; 
            int tnum = num/10;
            while(tnum > 0){
                mul = mul *10;
                tnum= tnum/10;
            }
            tnum = num;
            int n = 0;
            while(tnum > 0 && mul >= 10){
                nMul = nMul * 10;
                n = (num % nMul) * mul + (num / nMul);
                mul = mul / 10;
                tnum = tnum / 10;
                for(int m=num;m<=B;m++){
                    
                    if(n == m && m > num){
                        ctr++;
                    }
                }
                
                
                
         
            }
        }
        System.out.println("Case #"+(k+1)+": "+ctr);
        
    }
    }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;

/**
 * Apr 14, 2012Â 
 * @author parisel
 * GGJ - Qualification Round
 */
public class C {
    private static final int TEST= 0, SMALL= 1, LARGE= 2;
    private static final String[] infile= { "-test.in",  "-small.in",  "-large.in"};
    private static final String[] outfile= {"-test.out", "-small.out", "-large.out"};
    java.io.BufferedReader br;
    java.io.PrintWriter out;
    int N;
    String[] tok;

    private String[] getTok() throws IOException {return br.readLine().split(" ");}
    private int getInt() throws IOException {return Integer.valueOf(br.readLine());}
    private int[] getInt(int N) throws IOException {
        int[] data= new int[N]; tok= br.readLine().split(" ");
        for (int i=0; i<N; i++) data[i]= Integer.valueOf(tok[i]);
        return data;
    }
    private int toInt(String s) { return Integer.valueOf(s); }



    int A, B;
    int cn;
    private long answer() {
        int n, m;
        long count= 0;

        for (n=A; n<=B; n++)
            count+= reclycled(n);
        return count;
    }

    int[] div= {1, 10, 100, 1000, 10000, 100000, 1000000};
    HashSet<Integer> hs= new HashSet<Integer>();
    private int reclycled(int n) {
        int m, count= 0;
        for (int i=1; i<cn; i++) {
            m= (n/div[i]) + (n%div[i])*div[cn-i];
            if (m>n && m<=B && hs.add(m))  {
                ++count;
//                System.out.printf("%d -> %d\n", n, m);
            }
        }
        hs.clear();
        return count;
    }

    public void solve() throws IOException {
        int i,j,k;
        String s;

        int MODE= SMALL;
        br = new BufferedReader (new FileReader("C"+infile[MODE]));
        out = new PrintWriter(new BufferedWriter(new FileWriter("C"+outfile[MODE])));

        int C= Integer.valueOf(br.readLine());
        for (int c=1; c<=C; c++) {
            // read
            tok= getTok();
            A= toInt(tok[0]);
            B= toInt(tok[1]);
            cn= tok[0].length();
            // output
            out.printf("Case #%d: %d\n", c, answer());
        }
        out.close();
    }

    public static void main(String[] args) throws IOException {
        new C().solve();
    }
}
