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.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashSet;
import java.util.Set;


public class QRC 
{
	// Basics for all problems
	private static final String LARGE = "large";
	private static final String SMALL = "small";
	private static final String IN = ".in";
	private static final String OUT = ".out";
	private static String SET;
	
	// Problem specific Globals
	private static Set<Pair> mPairs;
	
	public static void main(String[] args) throws Exception
	{
		SET = SMALL; // Which set id being evaluated
		readInputFile(SET+IN);
	}
	
	private static void readInputFile(String in) throws Exception
	{
		BufferedReader br = new BufferedReader(new FileReader(new File(SET+IN)));
		String line = null;
		int caseCount = 1;
		
		br.readLine();
		while ( (line = br.readLine()) != null )
		{
			String[] input = line.split(" ");
			final int A = Integer.parseInt(input[0]);
			final int B = Integer.parseInt(input[1]);
			mPairs = new HashSet<Pair>();
			for (int n = A; n < B; n++ )
			{
				String rotation = String.valueOf(n);
				int digitCount = rotation.length();
				for ( int i = 0; i < digitCount; i++ )
				{
					rotation = rotateN(rotation);
					int m = Integer.parseInt(rotation);
					if ( m > n && m <= B )
					{	
						mPairs.add(new Pair(n,m));
						//System.out.println(" --> ("+n+", "+m+") @ "+mPairs.size());
					}
				}
			}
			writeOutputLine(String.format("Case #%d: %d", caseCount, mPairs.size()));
			caseCount++;
		}
		
		br.close();
	}
	
	private static String rotateN(String nAsString)
	{	
		String bulk = nAsString.substring(0,nAsString.length()-1);
		char jumper = nAsString.charAt(nAsString.length()-1); 
		return jumper+bulk;
	}
	
	private static void writeOutputLine(String line) throws Exception
	{
		BufferedWriter bw = new BufferedWriter(new FileWriter(new File(SET+OUT),true));
		bw.append(line);
		bw.newLine();
		bw.flush();
		bw.close();
	}
}
