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.File;
import java.io.PrintWriter;
import java.util.Scanner;


public class Recycled {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try
		{
			Scanner scanner = new Scanner(new File("./data/inRecycled"));
			PrintWriter writer = new PrintWriter(new File("./data/outRecycled"));
			int t = scanner.nextInt();
			scanner.nextLine();
			for(int i = 0; i < t; i++) {
				int a = scanner.nextInt();
				int b = scanner.nextInt();
				
				int res = 0;
				
				String check = "" + a;
				if(check.length() != 1)
				{
					
					for(int j = a; j <= b; j++){
						
						if(check.length() == 2)
						{
							String temp = "" + j;
							String other1 = temp.charAt(1) + "" + temp.charAt(0);
							int ot = Integer.valueOf(other1);
							if( ot <= b && j < ot){
								res++;
							}
						}
						else if(check.length() == 3)
						{
							String temp = "" + j;
							String other1 = "" + temp.charAt(2) + temp.charAt(0) + temp.charAt(1);
							String other2 = "" + temp.charAt(1) + temp.charAt(2) + temp.charAt(0);
							
							int ot1 = Integer.valueOf(other1);
							int ot2 = Integer.valueOf(other2);
							
							if ( ot1 <= b && j < ot1) {
								res++;
							}
							if ( ot2 <= b && j < ot2) {
								res++;
							}
						}
					}
				}
				writer.println("Case #" + (i+1) + ": " + res);

			}
			writer.close();
			scanner.close();
			
		}catch(Exception e) {e.printStackTrace();}
	}

}
