/*
 * 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.*;
import java.util.*;


public class RecycledNumbers {

	public static void main(String[] args) {
		Scanner sc = null;
		PrintWriter fout = null;
		int t = 0;

		try {
			sc = new Scanner(new File(args[0]));
			fout = new PrintWriter(new BufferedWriter(new FileWriter("result.txt")));
			t = sc.nextInt();
		} catch(Exception e) {
			System.out.println(e);
		}
		
		for( int i = 0; i < t; i++ ) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			boolean[] memo = new boolean[b+1];
			
			int digit = 1;
			while( digit * 10 <= a ) {
				digit *= 10;
			}
			
			long ret = 0;
			for( int j = a; j <= b; j++ ) {
				if( memo[j] ) continue;
				
				if( digit * 10 <= j ) {
					digit *= 10;
				}
				
				int tmp = j, dr = 1;
				do {
					int aa = tmp % 10;
					tmp = ( tmp / 10 ) + digit * aa;
					if( tmp > j && tmp <= b ) {memo[tmp] = true;
						ret += dr;
						dr++;					
					}
				} while( tmp != j );
			}
			
//			System.out.println("Case #" + (i+1) + ": " + ret);
			fout.println("Case #" + (i+1) + ": " + ret);
		}

		fout.close();
		sc.close();
	}

}
