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

import org.jfree.data.function.PowerFunction2D;

public class r2a
{

	Map numMap = new HashMap();
    int output = 0;

    /**
     * @param args
     */
    public static void main(String[] args)
    {
        r2a mk = new r2a();
        try {
            FileInputStream fstream = new FileInputStream("d:/cjinput.txt");
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            String str;
            int i = 0;
            while ((str = br.readLine()) != null) {
            	int begin=0,end = 0;
                i++;
                if (i == 1)
                    continue;
                mk.numMap = new HashMap();
                StringTokenizer strTok = new StringTokenizer(str, " ");
                while (strTok.hasMoreTokens()) {
                	begin =  Integer.parseInt(((String) strTok.nextToken()));
                    end = Integer.parseInt(((String) strTok.nextToken()));
                }

                mk.evaluate(i, begin, end);

            }
            in.close();
        }
        catch (Exception e) {
            System.err.println(e);
        }

    }

    private void evaluate(int rowNum, int begin, int end)
    {
    	output=0;
    	for (int i = begin; i<= end; i++) {
    		if(numMap.containsKey(Integer.valueOf(i)))
    			continue;
    		List l = getPairElems(i);
    		if (l.size() > 0) {
    			Iterator itr = l.iterator();
    			int ctr = 0;
    			ArrayList tempList = new ArrayList();
    			while (itr.hasNext()) {
    				int next = ((Integer)itr.next()).intValue();
    				if (next <= end && next > i) {
    					numMap.put(Integer.valueOf(next), i);
    					tempList.add(next);
    					ctr++;
    				}
    			}
    			ctr = getCounter(ctr+1,2);
/*    			if (tempList.size() > 0 || ctr > 0)
    				System.out.println("DD: " + i + ": " + tempList +" ; ctr = " + ctr);*/
    			output = output + ctr;
    		}
    		
    	}

        String outputStr = "Case #" + (rowNum -1) + ": " + output;
        
        System.out.println(outputStr);
    }

	private int getCounter(int n, int r) {
		int ret = 1;
		int nfactorial =1;
		for (int i = 2; i<=n; i++) {
			nfactorial = i*nfactorial;
		}
		int nrfact =1;
		for (int i = 2; i<=n-r; i++) {
			nrfact = i*nrfact;
		}
		
		return nfactorial/(2*nrfact);
	}

	private ArrayList getPairElems(int num) {
		ArrayList retList = new ArrayList();
		int temp = num;
		if (num/10 == 0)
			return retList;
		
		String str = String.valueOf(num);
		
		int arr[] = new int[str.length()];
		int x = str.length();
		while (temp/10 > 0) {
			arr[x-1] = temp%10;
			temp=temp/10;
			x--;
		}
		arr[0]=temp;
		
		int size = arr.length;
		for (int pos = size -1; pos >0; pos--) {
			if(arr[pos] == 0)
				continue;
			int pairNum = 0;
			int multiplier =1;
			for (int c=0; c < size-1; c++) {
				multiplier = multiplier*10;
			}
			pairNum = pairNum + (arr[pos]*multiplier);
			for(int ctr = pos+1, i=1; i < size; i++,ctr++) {
				if (ctr == size)
					ctr=0;
				if (multiplier!=1)
					multiplier=multiplier/10;
				pairNum = pairNum + (arr[ctr]*multiplier);
			}
			if (pairNum != num)
				retList.add(Integer.valueOf(pairNum));			
		}
		
		return retList;
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;


public class RecycledNumbers 
{
    private BufferedReader reader;
    private BufferedWriter writer;
    
    /**
     * @param args
     */
    public static void main(String[] args)
    {
        RecycledNumbers rn = new RecycledNumbers(args[0]);
        rn.executeTests();
    }
    

    public RecycledNumbers(String filename)
    {
        // Open file
        File file = new File(filename);
        try
        {
            reader = new BufferedReader(new FileReader(file));
            writer = new BufferedWriter(new FileWriter(file+".out"));
        }
        catch (IOException e)
        {
            // Failed to open new buffered reader
            System.err.println("Failed to open FileReader");
            e.printStackTrace();
            System.exit(-1);
        }
    }
    
    private void executeTests()
    {
        // Read number of test cases
        int numberOfTests = 0; 
        
        try
        {
            // Read number of tests (first line)
            numberOfTests = Integer.parseInt(reader.readLine());
        }
        catch (NumberFormatException | IOException e)
        {
            // Failed to read a line
            System.err.println("Failed to read a line");
            e.printStackTrace();
            System.exit(-1);
        }

        for (int testCase = 1; testCase <= numberOfTests; testCase++)
        {
            String[] input;
            
            try
            {
                input = reader.readLine().split("\\s");
                
                int min = Integer.parseInt(input[0]);
                int max = Integer.parseInt(input[1]);
                
                List<Integer> scores = new ArrayList<Integer>();
                
                int answer = totalRecycledPairs(min, max);
                
                writer.write("Case #" + testCase + ": " + answer + '\n');
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
        
        try
        {
            reader.close();
            writer.flush();
            writer.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }


	private static int totalRecycledPairs(int min, int max)
	{
		// Number -> Unique Pair Count
		Map<Integer, Integer> uniquePairCount = new HashMap<Integer, Integer>();
		
		int total = 0;
		
		for (int number = min; number <= max; number++)
		{
			int count = 0;
			
			for (Integer recycled : getRecycledPairs(number))
			{
				if (!uniquePairCount.containsKey(recycled) &&
						recycled <= max && recycled >= min)
				{
					count++;
				}
			}
			
			uniquePairCount.put(number, count);
			total += count;
		}
		
		return total;
	}
	
	
	private static Set<Integer> getRecycledPairs(int number)
	{
		Set<Integer> pairs = new HashSet<Integer>();
		
		String numberString = String.valueOf(number);
		
		for (int i = 1; i < numberString.length(); i++)
		{
			String rcirc = numberString.substring(numberString.length() - i) +
					numberString.substring(0, numberString.length() - i);
			
			int pair = Integer.parseInt(rcirc);  
			if (numberString.length() == String.valueOf(pair).length() &&
					pair != number)
			{
				pairs.add(Integer.parseInt(rcirc));
			}
		}
		
		return pairs;
	}

}

