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

public class RecycledNumbers {
	
	public static final String INPUT = "C-small-attempt0.in";
	public static final String OUTPUT = "output";
	
	public static void main(String args[]) throws IOException{
		Scanner s = UtilGoogle.readFile(INPUT);
		PrintWriter w = UtilGoogle.writeFile(OUTPUT);
		int t = Integer.parseInt(s.nextLine());
		
		for(int i = 0; i < t; i++){
			Integer A = s.nextInt();
			Integer B = s.nextInt();
			Integer N = calculateRecycleds(A, B);
			
			w.println("Case #" + (i + 1) + ": " + N);
		}
		s.close();
		w.close();
	}
	
	public static Integer calculateRecycleds(Integer A, Integer B){
		Integer qtd = 0;
		
		for(Integer i = A; i < B; i++){
			for(Integer j = i + 1; j <= B; j++){
				if(isRecycled(i, j)) qtd++;
			}
		}
		return qtd;
	}
	
	public static boolean isRecycled(Integer n, Integer m){
		String first = String.valueOf(n);
		String second = String.valueOf(m);
		
		for(int i = 0; i < first.length() - 1; i++){
			String temp = second.substring(i + 1, first.length());
			temp = temp.concat(second.substring(0, i+1));
			if(temp.equals(first)) return true;
		}
		return false;
	}
}
