package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author vhd
 */
import java.io.*;
import java.util.*;
import java.math.*;
public class NewClass {
    public static void main(String vhd[]) throws Exception
    {
       
      

      
     // FileInputStream fis = new FileInputStream ("jam.txt");
     // FileOutputStream out=new FileOutputStream("outt.txt");
     
        RandomAccessFile file = new RandomAccessFile("jam.txt", "rw");
        RandomAccessFile file1 = new RandomAccessFile("outt.txt", "rw");
        String t = file.readLine();
        int times= Integer.parseInt(t);

        
        
        for( int r= 1 ; r<= times ; r++)
        {
     
            StringTokenizer st= new StringTokenizer(file.readLine()); 
       
        int num1 = Integer.parseInt(st.nextToken());
        int num2=   Integer.parseInt(st.nextToken());
        
      char ch ;
      int count =0;
      //fis.read();
      Scanner sc = new Scanner (System.in);
      
      
      int main1 = num1;
      
      int main2= num2;
      int mid = (num1 + num2 )/2;
      int n,m;
     String s1 = (Integer.valueOf(num1)).toString();
     String s2 = (Integer.valueOf(num2)).toString();
    
     int temp[] = new int[100];
     
     int len1 = s1.length();
     int len2 = s2.length();
     int k =0,l =0, d=0;
     int arr[] = new int[100];
     int flag=1;
    // System.out.print(temp.length);
      for( int i = num1 ; i< num2 ; i++)
      {
          while(k<len1)
             {
                 n= i%10;
                 m= i/10;
                 arr[k]=n* (int)Math.pow(10.0, len1-1) +m;

                
                      
                 i= arr[k++];

             } k=0;
         
         while(k<len1)
         {
          
            if(i != arr[k] && arr[k]>i && arr[k]<=num2 && flag == 1)
              {
                  temp[d++]= arr[k];
                  count++;
                  
              } 
              else if (flag == 0)
              flag=1;
            
            
             for(int p=0 ; p<d; p++)
             {
                 if(arr[k+1]== temp [p])
                 {  System.out.print(temp[p]);
                     flag=0;
                 }
             }
             k++;
         }
         k=0;
          d=0;
      }
     
file1.write(("Case #"+r+": " +count+ "\n").getBytes());
               
        }
    }
}