/*
 * 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 C {
	static int solve(int a, int b) {
		int result = 0;
		for(int i = a; i <= b; ++i) {
			result += suffle(a, b, i);
		}
		
		return result/2;
	}
	
	static int suffle(int a, int b, int c) {
		int base = 1;
		int clen = (c+"").length();
		Set<Integer> r = new HashSet<Integer>();
		while(base < b) {
			base *= 10;
			int d = c/base;
			int e = c%base;
			int f = Integer.valueOf(e+""+d);
			int flen = (f+"").length();
			if(f != c && f >= a && f <= b && clen == flen) {
				r.add(f);
			}
		}
		
		return r.size();
	}
	
	public static void main(String args[]) {
		Scanner input = new Scanner(System.in);
		int test = input.nextInt();
		
		for(int i = 1; i <= test; ++i) {
			int a = input.nextInt(), b = input.nextInt();
			System.out.println("Case #" + i + ": " + solve(a, b));
		}
	}
}
