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();
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package codejamproblem2;

import java.util.Scanner;
import sun.tools.jar.resources.jar;

/**
 *
 * @author khalid
 */
public class CodeJamProblem2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        CodeJamProblem2 jam=new CodeJamProblem2();
        jam.solve();
      
    }
    
    public void solve() {
          
         Scanner in=new Scanner(System.in);
        int count=in.nextInt();
        in.nextLine();
        String res="";
        int numOfRe;
        for(int i=1;i<=count;i++)
        {
            numOfRe=numOfRecycled(in.nextInt(),in.nextInt());
            res+="Case #"+i+": "+numOfRe+"\n";
        }
        System.out.print(res);
    }
    public int numOfRecycled(int a,int b)
    {
        int counter=0;             
        for(int i=a;i<b;i++)
        {
            for(int c=b;c>i;c--)
                if(isRecycled(i+"", c+""))
                    counter++;            
        }

        return counter;
    }
    public boolean isRecycled(String num1,String num2)
    {
        if(num1==null||num2==null)
            return false;
        if(num1.length()!=num2.length())
            return false;
        String tmp;
        int leftStart;//,leftEnd;
        int rightStart,rightEnd;
        leftStart=0;
        rightEnd=num1.length();
       for(int i=0;i<num1.length()-1;i++)
       {
           rightStart=rightEnd-i-1;
           tmp="";
           tmp+=num1.substring(rightStart, rightEnd);
           tmp+=num1.substring(leftStart, rightStart);
           
           if(tmp.equals(num2))
               return true;           
       }
       return false;
    }
}