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();
		}
	}
}

package recycledNumbers;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Flow {

	public static InputData Readin(String filename){
		try {
			FileReader fr = new FileReader(filename);
			Scanner  sc = new Scanner(fr);  
	        
	        int Test_Number = sc.nextInt();
	        System.out.println("The Number of Tests: "+Test_Number);
	        
	        int[] A = new int[Test_Number];
	        int [] B = new int[Test_Number];
	        for(int i=0;i<Test_Number;i++){
	        	int testA = sc.nextInt();
	        	A[i] = testA;
	        	
	        	int testB = sc.nextInt();
	        	B[i] = testB;        	
	        	
	        	
	        	System.out.print("Test "+(i+1)+" "+testA+" ");
	        	System.out.println(testB+" ");
	        }
	        
	        sc.close();
	        
	        InputData inputdata = new InputData(Test_Number, A, B);
	        return inputdata;
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;  
		}

	}

	public static void Writeout(OutputData outputdata, String filename) {
		// TODO Auto-generated method stub
		try {
			PrintWriter pw = new PrintWriter(new FileWriter(filename));
			
			int Test_Number = outputdata.getSteps().length;
			for(int i=0;i<Test_Number;i++){
				pw.println("Case #"+(i+1)+": "+outputdata.getSteps()[i]);
			}
			
			pw.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
}
