import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

package com.google.codjam.utils;


import com.google.codjam.problems.ProblemInterface;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

import java.io.PrintWriter;

import java.util.ArrayList;
import java.util.HashMap;

public class FileLoader {

        
    public static void processFile(FileDataAndSettings fileData,String fileName,int nlinesXCaseGlobal,ProblemInterface worker)
    {
        try  
        {
            PrintWriter p = new PrintWriter (new File( fileName.replace(".in",".out")));
            
            BufferedReader buf
                = new BufferedReader(new FileReader(new File (fileName)));
            
            String tmp = "";
            for(int i=0,nLinesXCase=0,nCase=1;true;i++) 
            { 
                tmp = buf.readLine();
                if (tmp == null) 
                    break;
                if(i==0)
                {
                    fileData.setNCases(Integer.parseInt(tmp)); 
                }else
                {
                    ArrayList<String> dataCase = null;
                    try  
                    {
                        dataCase =fileData.getInputCase().get(nCase  -1);
                    } catch (IndexOutOfBoundsException ex)  {
                        fileData.getInputCase().add(new ArrayList<String>(0));
                        dataCase =fileData.getInputCase().get(nCase - 1);
                    } 


                    dataCase.add(tmp);
                    nLinesXCase++;
                    
                    if(nlinesXCaseGlobal==nLinesXCase)
                    {
                        nCase++;
                        nLinesXCase = 0;
                        p.println("Case #"+(nCase - 1)+": "+worker.run(dataCase));
                    }
                    
                   
                }
    
            }
            
            p.flush();
            p.close();
        } catch (Exception ex)  {
            ex.printStackTrace();
        } finally  
        {
        
        }
        
    
    
    }
    

    

}
