import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

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

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Scanner;
/**
 *
 * @author GERALD
 */
public class RecycledNumbers {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner scanner = null;
        PrintWriter output = null;
         try{
         scanner = new Scanner(new FileInputStream(args[0]));
         output = new PrintWriter(new FileOutputStream("resultRecycledNumbers.txt"));
         int noOfCases = scanner.nextInt();
         
         //prior initializations if any
         int A, B,count;
         for(int i=1; i<= noOfCases;++i){
             // TODO code application logic here
             A = scanner.nextInt();
             B = scanner.nextInt();
             count = noOfRecycledPair(A, B);
             output.append(String.format("Case #%d: %d\n",i,count));
         }
         
         } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }  finally{
            if( output!= null)
                output.close();
            if(scanner!= null)
                scanner.close();
        }
        
    }
     public static int noOfRecycledPairWithSameOrder(long a, long b){
             int count = 0;
             int order = 0;
             long num = a;
             do{
                num = num/10;
                order++;
             }while(num!=0);
             order --;
             System.out.println(order);
             long tens = 10;
             long bigNines = Math.round( Math.pow(10, order+1) -1);
             int ordnum = 0;
             long buffer = 0;
             ArrayList<Long> numList = new ArrayList<>();
             for(long i=a; i<=b; ++i){
                 
                 tens = 10;
                 numList.clear();
                 for(int j=0; j<= order-1; ++j){
                     
                     num =  Math.round((double)(i + ((i%(Math.round(tens)))*bigNines))/(double)tens);
                     
                     if(num >=a && num<=b&& num !=i&& !numList.contains(num)){
                         buffer = num;
                         ordnum=0;
                         do{
                             buffer = buffer/10;
                             ordnum++;
                         }while(buffer !=0);
                         ordnum--;
                         if(ordnum == order)
                            count++;
                     }
                   numList.add(num);
                     tens = 10*tens;
                 }
             }
             return count/2;
         }
      public static int noOfRecycledPair(long a, long b){
          int count = 0;
          int orderA = 0, orderB=0;
           long num = a;
             do{
                num = num/10;
                orderA++;
             }while(num!=0);
             orderA --;
              num = b;
             do{
                num = num/10;
                orderB++;
             }while(num!=0);
             orderB --;
             if (orderA == orderB){
                 System.out.println("equals");
                 count = noOfRecycledPairWithSameOrder(a, b);
             } else{
                 System.out.println("not equals");
                 long aLimit = (long) (Math.pow(10,orderA) -1);
                 count = noOfRecycledPairWithSameOrder(a, aLimit) + noOfRecycledPair(aLimit, b);
             }
         return count;
      }
}
