import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

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

package actual;

import codejam.*;
import java.io.*;
import java.util.Scanner;
/**
 *
 * @author atm
 */
public class PCL {
   public static void main(String[] args) throws Exception {
       int Cases;
       int L,U;
       String words[];
       
        FileInputStream fstreamIN = new FileInputStream("F:\\codejam\\input\\C-large.in");
        FileOutputStream fstreamOUT = new FileOutputStream("F:\\codejam\\output\\C-large.out");
        
        Scanner in=new Scanner(fstreamIN);
        PrintWriter out=new PrintWriter(fstreamOUT);
        
        Cases=in.nextInt();
        
        for(int i=0;i<Cases;i++) // Cases loop
        {
            L=in.nextInt();
            U=in.nextInt();
            int ans=0;
            if(L==1000){
                ans=0;
            }else if(L<10){
                ans=0;
            }else if(L<100){
                
                for(int j=L;j<=U;j++){ 
                    if(revtwo(j)<=U){
                        if(revtwo(j)>j)
                            ans++;                        
                    }
                }
            } else {
                for(int j=L;j<=U;j++){ 
                    String num=Integer.toString(j);
                    for(int k=0;k<num.length();k++){
                        if(ndigcir(j,k)<=U){
                            if(ndigcir(j,k)>j)
                                ans++;                        
                        }
                    }                  
                    
                }               
            } 
             out.printf("Case #%d: %d\n",i+1,ans);
        }
        out.close();   
   }
   static int revtwo(int num){
       return (num%10)*10+(num/10);
   }
   static int onedigcir(int num)
   {
       int newnum;
       newnum=(num%10)*100+(num/10);
       return newnum;
   }
   static int twodigcir(int num)
   {
       int newnum;
       newnum=(num%100)*10+(num/100);
       
       return newnum;
   }
   static int ndigcir(int num,int n)
   {
       String number=Integer.toString(num);
       String right=number.substring(number.length()-n, number.length());
       String newNum=right+number.substring(0,number.length()-n);
       return Integer.parseInt(newNum);
   }
}
