import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;


public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) 
	{
		try
		{
			  // Open the file that is the first 
			  // command line parameter
			  FileInputStream fstream = new FileInputStream("C-small-attempt0.in");
			  // Get the object of DataInputStream
			  DataInputStream in = new DataInputStream(fstream);
			  BufferedReader br = new BufferedReader(new InputStreamReader(in));
			  String strLine;
			  //Read File Line By Line			
			  int cases = 0;
			  ArrayList<String> input = new ArrayList();
			  ArrayList<String> output = new ArrayList();
			  
			  while ((strLine = br.readLine()) != null)   
			  {
				  // Print the content on the console
				  input.add(strLine);
			  }
			  //Close the input stream
			  in.close();
			  
			  cases = Integer.parseInt(input.get(0));			  
			  
			  for(int i=0; i<cases; i++)
			  {
				  String[] numbers = input.get(1 + 1*i).split(" ");				  
				  int A = Integer.valueOf(numbers[0]);
				  int B = Integer.valueOf(numbers[1]);				  
				  
				  int number = 0;
				  
				  for (int k=B; k>=A; k--)
					  for (int j=A; j<=k; j++)
					  {
						  String strJ = String.valueOf(j);
						  String strK = String.valueOf(k);
												  
						  
						  if (strJ.length() == strK.length())
						  {							  
							  
							  String newJ = strJ.substring(strJ.length() - 1) + strJ.substring(0, strJ.length() -1);
							  
							  while(!newJ.equals(strJ))
							  {								 
								  if (newJ.equals(strK))
									  number++;  
								  
								  newJ = newJ.substring(newJ.length() - 1) + newJ.substring(0, newJ.length() -1);
							  }
								  
						  }
					  }
				  
				  output.add("Case #" + (i + 1) + ": " + number);
			  }
			  
			  for (int i=0; i<output.size(); i++)
				  System.out.print(output.get(i) + "\n");
			  
		}
		catch (Exception e)
		{
			//Catch exception if any
			System.err.println("Error: " + e.getMessage() + " " + e.getClass());
		}

	}

}
