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


public class C {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter("c.txt")));
//		Scanner s = new Scanner(System.in);
		Scanner s = new Scanner(new File("c.in"));
//		BufferedReader in = new BufferedReader(new FileReader(new File("a-small.in")));
		int n = s.nextInt();
		for(int t=1;t<=n;t++){
			int a = s.nextInt(), b = s.nextInt();
			System.out.println("Case #"+t+": "+go(a,b));
			pw.println("Case #"+t+": "+go(a,b));
			pw.flush();
		}
	}
	static int go(int a,int b){
		int r = 0;
		for(int n=a;n<b;n++){
			for(int m=n+1;m<=b;m++){
				if(n<m){
					if(ok(n,m)) ++r;
				}
			}
		}
		return r;
	}
	static boolean ok(int a,int b){
		String aa = a+"", bb = b+"";
		if(aa.length() != bb.length()) return false;
		for(int i=0;i<aa.length();i++){
			if((aa.substring(i) + aa.substring(0,i)).equals(bb)) return true;
			
		}
		return false;
	}
}
