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.InputStreamReader;

public class Recycled {
	static int no_Test_Cases =0; 			  		//number of test cases
	static String input_Array[];					//to read input file	
	static int output_Array[];  					// to write the t output lines
		
	public static void main(String[] args) {
		readFile();
		
		for (int i = 0; i< no_Test_Cases; i++ ){
			recycled_Number(i);
		}
		
		writeFile();
	}		
		
	public static void readFile(){
		
		try{
				FileInputStream fstream = new FileInputStream("C:/sarab/input.txt");
                DataInputStream in = new DataInputStream(fstream);
                BufferedReader br = new BufferedReader(new InputStreamReader(in));
               
                String strLine;
                
                strLine = br.readLine();
                no_Test_Cases = Integer.parseInt(strLine);
                
                input_Array = new String[no_Test_Cases];
                output_Array = new int[no_Test_Cases];
                
                for (int i = 0; i< no_Test_Cases; i++){
                		strLine = br.readLine();
                		input_Array[i] = strLine;
                } 		
                //Close the input stream
                in.close();
		}
        
		catch (Exception e){//Catch exception if any
                System.err.println("Error: " + e.getMessage());
        }
        
	} 
	
	public static void recycled_Number(int i){
		
		String s1 = input_Array[i];
		
		String s2[] = s1.split(" ");
		
		int a = Integer.parseInt(s2[0]);
		int b = Integer.parseInt(s2[1]);
		
		
		
		char c1[] = s2[0].toCharArray();
		int length = c1.length;
		
		int no_Array[] = new int[length-1];
		int counter = 0; 				
		String s3 = "";
		
		
		for (int i1 = a; i1 < b; i1++){
				String s4 = ""+i1;
				c1 = s4.toCharArray();
			for(int i2 = 0; i2 < length-1; i2++){
				
				for(int i3 =1; i3 <= length-1 ; i3++){
					s3 = s3+c1[i3];
				}
				s3 = s3+c1[0];
				//System.out.println(s3);
				no_Array[i2] = Integer.parseInt(s3);
				
				c1 = s3.toCharArray();
				s3 = "";
			
			}
			for (int i5 = 0; i5 < length -2 ;i5++){
				for (int i6 = i5+1; i6 < length -1; i6++){
					if(no_Array[i6] == no_Array[i5]){
						no_Array[i6] = i1;
					}
				}
			}
			for (int i4 =0; i4 < length-1 ; i4++){
				if (no_Array[i4] > i1 && no_Array[i4] <= b) {
					counter++;
					
				}
			}	
		
			
		}		
		output_Array[i]= counter;
		 
	}
		
		
	
	public static void writeFile(){
        String forOutput;
        try{
                 
                FileWriter fstream = new FileWriter("C:/sarab/output.txt");
                BufferedWriter out = new BufferedWriter(fstream);
                for (int i=0; i<no_Test_Cases; i++){
                	
                      forOutput="Case #"+(i+1)+": "+output_Array[i]+"";
                      out.write(forOutput);
                      out.newLine();
                }
                //Close the output stream
                out.close();
                }catch (Exception e){//Catch exception if any
                System.err.println("Error: " + e.getMessage());
                }

  }


}	

