package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

/**
 * Recycled Numbers
 */
package com.google.jam.qualification;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;

public class C {
	
	public static String moveFromEndToFront(String number, int n) {
		String begin = number.substring(0,number.length()-n);
		String end = number.substring(number.length()-n);
		return end+begin;
	}
	
	public static void main(String[] args) {
		try {
			FileOutputStream fos = new FileOutputStream("C-small-attempt0.out");
			System.setOut(new PrintStream(fos, true));
			
			FileInputStream fis=new FileInputStream(new File("C-small-attempt0.in"));
			InputStreamReader in=new InputStreamReader(fis);
			BufferedReader br=new BufferedReader(in);
			
			String line="";
			int nbTest = Integer.parseInt(br.readLine());
			
			for(int i=1; i<=nbTest; i++) {
				line = br.readLine();
				Scanner sc = new Scanner(line);
				int cpt = 0;
				int min = sc.nextInt();
				int max = sc.nextInt();
				
				for(int k=min; k<=max; k++) {
					String number = String.valueOf(k);
					HashMap<Integer,Integer> table = new HashMap<Integer,Integer>();
					
					for(int l=1; l<number.length(); l++) {
						String reverse = moveFromEndToFront(number,l);
						int numberVal = Integer.valueOf(number);
						int reverseVal = Integer.valueOf(reverse);
						if( (reverseVal <= max) && (numberVal < reverseVal) ) table.put(reverseVal, numberVal);
					}
					cpt += table.size();
				}
				
				
				System.out.println("Case #" + i + ": " + cpt);
			}
	
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			System.out.println("File not found");
			e.printStackTrace();
		}
		catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}

}
