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.codejam.utils.files;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;


public class ManejoArchivos {
    private static String path = "D:\\Proyectos\\Google\\files\\2012\\";
    
    public static int[][] readFile(String name) throws FileNotFoundException, 
                                                        IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(path + name)));
        
        int arr[][] = new int[Integer.parseInt(br.readLine())][2];
        for(int i=0;i<arr.length;i++) {
            String str[] = br.readLine().split(" ");
            arr[i][0] = Integer.parseInt(str[0]);
            arr[i][1] = Integer.parseInt(str[1]);
        }
        
        return arr;
    }
    
    public static void writeFile(String name, StringBuffer sb) throws FileNotFoundException {
        PrintWriter out = new PrintWriter(new FileOutputStream(path + name));
        out.print(sb.toString());
        out.flush();
        out.close();
    }
    
    
    public static int LOG = 0;
    private static BufferedReader in = null;
    public static void initInput(String name) throws FileNotFoundException {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(path + name + ".in")));
    }
    public static void closeInput() throws IOException {
        in.close();
    }
    
    private static void logRead(String str) {
        if( LOG == 1 ) {
            System.out.println(str);
        }
    }
    public static String getString() throws IOException {
        String str = in.readLine();
        logRead(str);
        
        return str;
    }    
    public static String[] getStrings() throws IOException {
        String str = in.readLine();
        logRead(str);
        
        return str.split(" ");
    }
    public static int getInt() throws IOException {
        String str = in.readLine();
        logRead(str);
        
        return Integer.parseInt(str);
    }
    public static int[] getInts() throws IOException {
        String str = in.readLine();
        logRead(str);
        
        String arr[] = str.split(" ");
        int ints[] = new int[arr.length];
        for(int i=0;i<arr.length;i++) {
            ints[i] = Integer.parseInt(arr[i]);
        }
        return ints;
    }
    public static long[] getLongs() throws IOException {
        String str = in.readLine();
        logRead(str);
        
        String arr[] = str.split(" ");
        long longs[] = new long[arr.length];
        for(int i=0;i<arr.length;i++) {
            longs[i] = Long.parseLong(arr[i]);
        }
        return longs;
    }
    
    public static int TIPO_WRITE = 0;
    private static PrintWriter out = null;
    private static String strName = null;
    public static void initOutput(String name) throws FileNotFoundException {
        initOutput(name, false);
    }
    public static void initOutput(String name, boolean append) throws FileNotFoundException {
        strName = name;
        out = new PrintWriter(new FileOutputStream(path + name + ".out", append));
    }
    public static void closeOutput() {
        try {
            out.flush();
            out.close();
        } catch( Exception e ) {
            e.printStackTrace();
        }
    }

    private static void openWrite() throws FileNotFoundException {
        if( TIPO_WRITE == 1 ) {
            initOutput(strName, true);
        }
    }
    private static void closeWrite() {
        if( TIPO_WRITE == 1 ) {
            closeOutput();
        }
    }
    public static void writeCase(int i, String str) throws FileNotFoundException {
        openWrite();
        
        out.print("Case #");
        out.print(i);
        out.print(": ");
        out.print(str);
        out.print("\n");
        
        closeWrite();
    }
}
