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.FileReader;
import java.io.PrintWriter;
import java.io.FileWriter;
import java.util.*;

public class C
{	
	public C( String fn)
	{
		try{
			BufferedReader r = new BufferedReader( new FileReader( fn + ".in"));
			PrintWriter w = new PrintWriter( new FileWriter( fn + ".out"));
			int t = Integer.valueOf( r.readLine());
			for( int i = 0; i < t; i++){
				String[] line = r.readLine().trim().split( " ");
				int y = 0;
				int a = Integer.valueOf( line[0]);
				int b = Integer.valueOf( line[1]);
				
				for( int j = a; j < b; j++){
					for( int k = j+1; k <= b; k++){
					
						String n = String.valueOf( j);	
						String m = String.valueOf( k);
						
						int c = 0;
						while( (c = n.indexOf( m.charAt( 0), c)) != -1){
							if( m.equals( n.substring( c) + n.substring( 0, c))){
								y++;
								break;
							}
							c++;	
						}
					}
				}
				w.println( "Case #" + (i+1) + ": " + y);
				System.out.println( "Case #" + (i+1) + ": " + y);
			}
			w.close();
			r.close();
		}catch( Exception e){}
	}
	
	public static void main( String[] args) throws Exception
	{
		new C( args[0]);
	}
}