/*
 * 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.util.*;

public class RCTest{

	public static void main(String[] args){
	
		Scanner scan = new Scanner(System.in);
		int numberOfCases = Integer.parseInt(scan.nextLine());
		for(int i = 1; i <= numberOfCases; ++i){
			String line = scan.nextLine();
			String[] inputs = line.split(" ");
			int lower = Integer.parseInt(inputs[0]);
			int upper = Integer.parseInt(inputs[1]);
			RCTest r = new RCTest();
			System.out.println("Case #" + i + ": " + r.getRecycleNumbers(lower, upper));
		}
	}
	
	public int getRecycleNumbers(int a, int b){
		this.lower = a;
		this.upper = b;
		int counter = 0;
		for(int i = a; i<=b; ++i){
			int originalNumber = i;
			int index = getIndex(originalNumber);
			int recycledNumber = getRecycledNumber(i,index);
			
			while(originalNumber!=recycledNumber){
			
				if(originalNumber < recycledNumber && recycledNumber <= upper)++counter;
				recycledNumber = getRecycledNumber(recycledNumber,index);
			}
			
		}
		return counter;
	}
	public int getRecycledNumber(int number, int index){
		int remainder = number % 10;
		int quotient = number/10;
		int recycledNumber = ((int)Math.pow(10,index) * remainder) +  quotient;
		return recycledNumber;
	}	
	
	private int getIndex(int number){
		int index = 0;
		while(number!=0){
			number/=10;
			++index;
		}
		return index-1;
	}
	private int lower;
	private int upper;
}