import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.util.*;
import java.io.*;

public class Solution {
	public void doMain() throws Exception {
		BufferedReader in = new BufferedReader(new FileReader("input.txt"));
		PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));		
		int CaseNumber = Integer.parseInt(in.readLine());		
		for (int cas=1; cas <= CaseNumber; cas++) {
			int nbr = 0 ;			
			String[] str = in.readLine().split(" ");
			int A = Integer.parseInt(str[0]);
			int B = Integer.parseInt(str[1]);
			if(A < 10) {
				pw.println("Case #"+cas+": "+nbr);
			}
			else if(A==B){
				pw.println("Case #"+cas+": "+nbr);
			}
			else{
				ArrayList<String> n = new ArrayList<String>();
				for(int i=A; i<=B; i++){
					String st = Integer.toString(i);
					int l = st.length();
					for(int j=l-1; j>0 ; j--){
						String s = st;
						s = s.substring(j) + s;
						s = s.substring(0,l);
						
						if(Integer.parseInt(s) >A && Integer.parseInt(s) <B && Integer.parseInt(s)!=i && !n.contains(""+i+"-"+s) && !n.contains(s+"-"+i)){
							n.add(s+"-"+i);
							n.add(""+i+"-"+s);
							nbr++;
						}
					}	
				}
				pw.println("Case #"+cas+": "+nbr);
			}
		}
		
		in.close();
		pw.flush();
		pw.close();
	}
	
	public static void main(String[] args) throws Exception {
		(new Solution()).doMain();
	}
}