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.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Scanner;


public class recycled {
	private static File f = new File("C:/Users/Cybermask/Desktop/myfile.txt");
	private static File outfile = new File("C:/Users/Cybermask/Desktop/out.txt");
	private static BufferedReader reader;

	private static String read() throws Exception{
		return reader.readLine();
	}
	private static int toint(String s){
		return Integer.parseInt(s);
	}
	private static ArrayList<Object> reverse(ArrayList<Object>list){
		ArrayList<Object> result = new ArrayList<Object>();
		for(int i=0;i<list.size();i++)
			result.add(list.get(list.size()-i-1));
		return result;
		
	}
public static void main(String args[])throws Exception{
	reader = new BufferedReader(new FileReader(f));
	PrintWriter pw = new PrintWriter(outfile);
	int n = toint(read());
	for(int i = 0 ; i<n;i++){
		String string = read();
		Scanner s = new Scanner(string);
		s.useDelimiter(" ");
		int f = s.nextInt();
		int l = s.nextInt();
		int count = 0 ;
		pw.print("Case #"+(i+1)+": ");
	
		for(int k=f;k<=l;k++){
			String number = k+"";
			int first = toint(number);
			HashSet<Integer> hs = new HashSet<Integer>();
			for(int o=1;o<number.length();o++){
				
				String 	number2=number.substring(number.length()-o,number.length())+""+number.substring(0,number.length()-o);
				
		
				
				int result = toint(number2);
				if(number.length()==number2.length() &&result>=f && result<=l && result > first){
					hs.add(result);
				}
				
			}
			count+=hs.size();
		}
		pw.println(count);
		
		
	}
	pw.flush();
}
}