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);
		}

	}
}

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

public class Problem3
{
    static int size = 4;
    public static void main(String args[])
    {
        try
        {
            FileInputStream fstream = new FileInputStream("C-large.in");
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            
            String line;
            int i = 0;
            int num1 = 0, num2 = 0;
            int times;
            Scanner sc;
            int count, total;
            while ((line = br.readLine()) != null)
            {
                if(i == 0)
                {
                    total = Integer.parseInt(line);
                    i = 1;
                    continue;
                }
                sc = new Scanner(line);
                if(sc.hasNextInt()) num1 = sc.nextInt();
                if(sc.hasNextInt()) num2 = sc.nextInt();
                size = (num1==0)?1:(int)Math.log10(num1) + 1;
                times = solve(num1, num2);
                System.out.println("Case #"+i+": "+times);
                write("Case #"+i+": "+times);
                i++;
            }
            in.close();
        }catch (Exception e){
            System.err.println("Error: " + e.getMessage());
        }       
    }
    
    public static int solve(int num1, int num2)
    {
        int i;
        int count = 0;
        int generated;
        for(i = num1; i <= num2; i++)
        {
            for(int j = 1; j < size; j++)
            {
                generated = generate(i, j);
                if(num1 <= i && i < generated && generated <= num2) 
                {
                    count++;
                }
            }
        }
        return count;
    }
    
    public static int generate(int i, int j)
    {
        int temp = i;
        int putfor = temp % (power(10, j));
        int last = temp / (power(10, j));
        int generated = putfor*power(10, size-1-(j-1)) + last;
        return generated;
    }
    
    public static int power(int i, int j)
    {
        int power = 1;
        for(int k = 0; k < j; k++)
        {
            power *= i;
        }
        return power;
    }
    
    public static void write(String text)
    {
        try
        {
            BufferedWriter bw = new BufferedWriter(new FileWriter(new File("Problem3large.out"), true));
            bw.write(text);
            bw.newLine();
            bw.close();
        }catch (Exception e) {
            System.err.println("Error: " + e.getMessage());
        }
    }
}