import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

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

package google_code_jam;


import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.StringTokenizer;

/**
 *
 * @author lenovo
 */
public class C {


    public static void main(String[] args) throws IOException {
        // TODO code application logic here

        BufferedReader br = new BufferedReader(new FileReader("C-small-attempt1.in"));
        PrintWriter pw = new PrintWriter("C.out" );
        StringTokenizer st=new StringTokenizer(br.readLine());
       // System.out.println(st);
        int x = Integer.parseInt(st.nextToken());
        a1:for (int i = 0; i < x; i++) {
           st = new StringTokenizer(br.readLine());
           int min = Integer.parseInt(st.nextToken());// number of players
           int max = Integer.parseInt(st.nextToken());//number of surprising
           int res = solve(min , max);
           pw.append("Case #"+(i+1)+": "+res+"\n");
      }
        pw.close();
    }
    public static int solve(int a , int b){
        int count=0;
        int x ,y;
        for (int i = a; i < b; i++) {
            String item=i+"";
            int len=item.length();
            x=i;
            HashSet<Integer> hs = new HashSet<Integer>();
            for (int j = 0; j < len; j++) {
                y=x%10;
                y=y*(int)(Math.pow(10, len-1))+(x/10);
                if( y<=b && y>i ){
                    if(hs.add(y))
                    count++;
                }
                x=y;
            }

        }
        return count;
        }


}

