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 c;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 *
 * @author KazakhPride
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        // TODO code application logic here
        Scanner in = new Scanner(new File("C-small-attempt2.in"));
        PrintWriter out = new PrintWriter(new File("output.txt"));

        int n = in.nextInt();
        int len = 0;

        for (int i = 1; i <= n; i++) {
            out.print("Case #" + i + ": ");
            int current_n = 0;
            int current_m = 0;
            int range = 0;
            int a = in.nextInt();
            int b = in.nextInt();
            int count = 0;

            if ((a + "").length() == 1 && (b + "").length() == 1) {
                count = 0;
            } else {
                range = b - a;
                for (int j = 0; j < range; j++) {
                    current_n = j + a;
                    current_m = j + a;

                    int l = (current_n + "").length();
                    // if (l==3) len=9;
                    // if(l==4) len = 28;
                    for (int k = 0; k < l; k++) {
                        String m = current_m + "";
                        if (m.length() < l) {
                            for (int w = 0; w < (l - m.length()); w++) {
                                m = "0"+m;
                            }
                        }
                        current_m = Integer.parseInt(m.substring(l - 1) + m.substring(0, l - 1));
                        if (current_m <= b && current_m > current_n && current_m >= a) {
                            ++count;
                        }
                    }
                }
            }
            out.println(count);
        }
        in.close();
        out.close();
    }
}