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.IOException;
import java.util.ArrayList;


public class recycling {
	public static void main (String args[]){
		if (args.length != 1){
			System.out.println ("Gimme the right arguments!");
			return;
		}
		File f = new File(args[0]);
		int testcases, A, B;
		ArrayList <Integer> values = new ArrayList <Integer>();
		
	
		

		try{
			BufferedReader in = new BufferedReader (new FileReader(f));
			String s;
			testcases = Integer.parseInt(in.readLine());
			for (int i = 1; i<=testcases; i++){
				String temp [] = in.readLine().split(" ");
				A = Integer.parseInt(temp[0]);
				B = Integer.parseInt(temp[1]);
				int count = 0;
				for (int j=A; j<=B; j++){
					ArrayList <Integer> v = new ArrayList <Integer> ();
					v.add(j);
					String number = Integer.toString(j);
					int val;
					for (int k=0; k<number.length(); k++){
						number = shuffle(number);
						val = Integer.parseInt(number);
						if (j <= val && val <= B && !(v.contains(val))){
							count++;
							v.add(val);
						}
					}
					
					
					
				}
				
				System.out.printf ("Case #%d: %d\n", i, count );
				
				
			


			}
		}
			//while ((s = in.readLine()) != null){

			//}

		
		catch (IOException e){

		}
	}
	
	public static String shuffle (String s){
		String shuffled = "";
		for (int i = 1; i<s.length(); i++){
			shuffled += s.charAt(i); 
		}
		shuffled += s.charAt(0);
		return shuffled;
	}

}
