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 codejam;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;


/**
 *
 * @author Mudasar
 */
public class RecycledNumbers {
    
    static String strLine =null;
 static int result = 0;
    static int first = 0;
	static int second = 0;
 public static void main(String[] args) {
  
     try {
        
         FileInputStream fstream = new FileInputStream("textfile.in");
         // Get the object of DataInputStream
         DataInputStream in = new DataInputStream(fstream);
         BufferedReader br = new BufferedReader(new InputStreamReader(in));

         FileWriter ifstream = new FileWriter("output.txt");
         BufferedWriter out = new BufferedWriter(ifstream);


         int resultCounter = 0;
         
         while ((strLine = br.readLine()) != null) {
             if (resultCounter == 0) {
                 resultCounter = 1;
                 continue;
             }
             
             String records[] = new String[2];
             records = strLine.split(" ");
             first = Integer.parseInt(records[0]);
             second = Integer.parseInt(records[1]);
             
             result = recyleAble(first , second);
               
             
             String output = "Case #" + resultCounter + ": " + result + "\n";
            // System.out.println("Case #" + resultCounter + ": " + result);
             try {
                
                 out.write(output);
                

             } catch (Exception e) {
                 System.err.println("Error: " + e.getMessage());
             }
             result = 0;
             resultCounter++;
         }
         
         in.close();
         out.close();
     } catch (Exception e) {// Catch exception if any
         System.err.println("Error: " + e.getMessage());
     }
 }
private static  int recyleAble(int _first, int _second) {
	// TODO Auto-generated method stub
	int count = 0;
	for(int i = _first ; i< _second ; i++){
		for(int j = i + 1; j <= _second; j ++ )
			if(rotateAndCheck(i , j))
				count ++ ;
	}
   //System.out.println("/n");
	return count;
}
private static boolean rotateAndCheck(int i, int j) {
	// TODO Auto-generated method stub
	int length = Integer.toString(i).length();
	int r  ; 
	for(int b= (length-1) ; b>=0 ; b--)
	{
		r = i % 10 ; i/=10;
		i = (int) (r*Math.pow(10, length-1) + i );
		if ( i == j)
		{ // System.out.print(i + ", ");
			return true;
	}}
	

	return false;
}

}
