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

import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

/**
 *
 * @author imgps
 */
public class C {
    public static void main(String args[]) throws Exception{
        int A,B;
        int ctr = 0;
        int testCases;
        
        Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in "));
        testCases = sc.nextInt();
        int input[][] = new int[testCases][2];
        for(int i=0;i<testCases;i++)
        {
          //  System.out.print("Enter input A B: ");
            input[i][0] = sc.nextInt();
            input[i][1] = sc.nextInt();
            
        }
  

for(int k=0;k<testCases;k++){
      ctr = 0;
      A = input[k][0];
      B = input[k][1];
        for(int i = A;i<=B;i++){
            int num = i;
            int nMul = 1;
            int mul = 1; 
            int tnum = num/10;
            while(tnum > 0){
                mul = mul *10;
                tnum= tnum/10;
            }
            tnum = num;
            int n = 0;
            while(tnum > 0 && mul >= 10){
                nMul = nMul * 10;
                n = (num % nMul) * mul + (num / nMul);
                mul = mul / 10;
                tnum = tnum / 10;
                for(int m=num;m<=B;m++){
                    
                    if(n == m && m > num){
                        ctr++;
                    }
                }
                
                
                
         
            }
        }
        System.out.println("Case #"+(k+1)+": "+ctr);
        
    }
    }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import util.MyUtil;


public class ProblemC {

	/**
	 * @param args
	 * @throws IOException 
	 * @throws NumberFormatException 
	 */
	public static void main(String[] args) throws Exception {
		String title = "C-small-attempt0.in";

		BufferedReader reader = MyUtil.getReader(title);
		int caseNumber = Integer.parseInt(reader.readLine());
		BufferedWriter writer = MyUtil.getWriter(title);
		
		for (int i = 0 ; i < caseNumber; i++){
			String line = reader.readLine();
			String result = subRoutine(line);
			
			writer.write("Case #" + (i + 1) + ": " + result + "\n");
			System.out.println("Case #" + (i + 1) + ": " + result);
		}
		
		writer.flush();

	}
	
	private static String subRoutine(String line){
		StringBuilder sb = new StringBuilder();
		String[] elements = line.split(" ");
		long A = Long.parseLong(elements[0]);
		long B = Long.parseLong(elements[1]);
		long count = 0;
		
		for (long n = A ; n < B ; n++){
			Set<Long> ms = new HashSet<Long>();
			String str = String.valueOf(Math.abs((long)n));
			String newn = Long.toString(n);
			for (int i = 1; i < str.length(); i++){
				newn = shift(newn);
				
				long m = Long.parseLong(newn);
				if (m > n && m <= B && m > A){
					ms.add(m);
					//System.out.println(n + " : " + m);
					test(n,m);
				}
			}
			count += ms.size();
			
		}
		sb.append(count);
		return sb.toString();
	}
	
	public static boolean test(long n, long m){
		String nstr = Long.toString(n);
		String mstr = Long.toString(m);
		
		for (int i = 0; i < nstr.length(); i++){
			nstr = nstr.charAt(nstr.length() - 1) + nstr;
			nstr = nstr.substring(0, mstr.length());
			
			if (nstr.equals(mstr)){
				return true;
			}
		}
		return false;
	}
	private static String shift(String nstr){
		long n =  Long.parseLong(nstr);
		StringBuilder shifted = new StringBuilder();
		long last = n % 10;
		shifted.append(last);
		for (int i = 0; i < nstr.length() - 1; i++){
			shifted.append(nstr.charAt(i));
		}
		
		return shifted.toString();
	}
}
