/*
 * 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.IOException;
import java.io.InputStreamReader;


public class Recycled {

	
	public static boolean isRecycled(int a, int b) {
		String left = a+"";
		String right = b+"";
		if(left.length()!=right.length()) return false;
		int l = left.length();
		for(int i=0;i<l;i++) {
			boolean o = true;
			for(int j=0;j<l;j++) {
				if(left.charAt((i+j)%l) == right.charAt(j)) continue;
				else o=false;
			}
			if(o) return true;
		}
		return false;
	}
	
	public static int next(int in) {
		int p = (int) (Math.log(in)/Math.log(10));
		int last = in - Math.abs(in/10)*10;
		if(last==0) return 0;
		return (int) (last*Math.pow(10, p) + in/10);
	}
	
	public static void main(String[] args) throws NumberFormatException, IOException {
//		System.out.println(isRecycled(12345, 234521));
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int cases = Integer.parseInt(in.readLine());
		for (int i = 1; i <= cases; i++) {
			String[]e = in.readLine().trim().split(" ");
			int A = Integer.parseInt(e[0]);
			int B = Integer.parseInt(e[1]);
			
			int count = 0;
			
			for(int x=A;x<B;x++) for(int y=x+1;y<=B;y++) if(isRecycled(x, y)) count ++;
			
			System.out.println("Case #"+i+": "+count);
		}
	}
	
}
