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.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class problem3 {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		 FileInputStream fstream = new FileInputStream("C:\\Profiles\\sys4qa\\Desktop\\C-small-attempt0.in.txt");
		  // Get the object of DataInputStream
		  DataInputStream in = new DataInputStream(fstream);
		  BufferedReader br = new BufferedReader(new InputStreamReader(in));
		  String strLine;	
		  Integer T= 0;
		 
		  Integer i1,i2;
		  ArrayList inputPair =new ArrayList();
			ArrayList input= new ArrayList<ArrayList>();
		  while ((strLine = br.readLine()) != null)   {
			  
			 
			  if (T==0)
			  {
				  T= Integer.parseInt(strLine);
			  }
			  else
			  {
				  String s[]=strLine.split(" ");
				  inputPair =new ArrayList();
				  inputPair.add( Integer.parseInt(s[0]));
					
				  inputPair.add( Integer.parseInt(s[1]));
					 input.add(inputPair);
			  }
			  
			  }
			  //Close the input stream
			  in.close();
		
			  FileWriter fstream1 = new FileWriter("C:\\Profiles\\sys4qa\\Desktop\\out.txt");
			  BufferedWriter out = new BufferedWriter(fstream1);
			 
			  
		
int id=0;
		Iterator iter=input.iterator();
		while (iter.hasNext()) {
			ArrayList ip= (ArrayList) iter.next();
			int A = (Integer)ip.get(0);
			int B= (Integer) ip.get(1);
			int cunt=execute(A,B);
			id++; 
			
			 out.write("Case #"+id+": "+cunt+"\n");
		}
		//Close the output stream
		  out.close();

	}

	static int execute(int A, int B) {

		int count = 0;

		for (int i = A; i <= B; i++) {
			Set j = listOfReoderedNumbers(i);

			int k = 0;
			Iterator iter = j.iterator();
			while (iter.hasNext()) {
				k = (Integer) iter.next();
				if ((k > i) && (k <= B) && (k >= A)) {

					count++;

				}
			}

		}
		return (count);

	}

	static Set listOfReoderedNumbers(int i) {
		Set d = new HashSet();
		d.add(i);
		int res = i;
		int t = (i + "").length();
		for (int cnt = 0; cnt < t - 1; cnt++) {
			if (((res + "").length() == t)) {
				int num = res;
				Integer s = Integer.parseInt((num + "").charAt(0) + "");
				int temp = (int) (num - (int) (s * (Math.pow(10, t - 1))));
				res = (temp) * 10 + s;
				if ((res + "").length() == t)
					d.add(res);
			} else {
				res = res * 10;
				d.add(res);
			}

		}

		return d;

	}
}
