/*
 * 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.*;

class Main {
	
	
    public static void main( String[ ] args ) {
    	Scanner in=new Scanner(System.in);
    	int cin=in.nextInt();
    	for (int ci=1;ci<=cin;ci++){
    		int a=in.nextInt(),b=in.nextInt();
    		int ans=0;
    		for (int i=a;i<b;i++){
    			HashSet<Integer> la=new HashSet<Integer>();
    			int ttmp=1;
    			int tmp=10;
    			int tgmp=10;
    			while (tgmp<=i){
    				tgmp*=10;
    			}
    			while (i>tmp){
    				tgmp/=10;
    				int m=i%tmp*tgmp+i/tmp;
    				if (m>i&&m<=b&&i%tmp>=ttmp) {la.add(m);}
    				ttmp=tmp;
    				tmp*=10;
    			}
    			ans+=la.size();
    		}
    		System.out.println("Case #"+ci+": "+ans);
    	}
    }
}
 