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.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Hashtable;


public class MainJam2 {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		
		BufferedReader in = new BufferedReader(new FileReader("C:\\Jam\\teste.txt"));
		File file = new File("C:\\Jam\\saida.txt");
		FileWriter print = new FileWriter(file);
		
		int i = Integer.parseInt(in.readLine());
		
		int k = i;
		
		while(i > 0){
			
			ArrayList<String> list = new ArrayList<String>();
			
			int resp = 0;
			String integer [] = in.readLine().split(" ");
			
			int ini = Integer.parseInt(integer[0]);
			int end = Integer.parseInt(integer[1]);
			
			for(int j = ini; j <= end; j++){
				
				String reverse = ""+j;
				String ini_reverse = reverse;
				
					do{
						String ini_s = reverse.substring(0, 1);
						reverse = reverse.substring(1, reverse.length()) + ini_s;
								
						int int_reverse = Integer.parseInt(reverse);
						
						if(reverse.equals(ini_reverse))
							break;
						
						if(int_reverse <= end && int_reverse >= ini && !list.contains(reverse)){
							System.out.println((k - i + 1)+" : "+reverse + " " + j);
							list.add(""+j);
							resp++;
						}
						
					}
					while(!reverse.equals(ini_reverse));
				
			}
			
			print.write("Case #"+ (k - i + 1) +": "+resp+System.getProperty("line.separator"));
			
			i--;
		}
		print.close();


	}

}
