import java.io.*;

class code1
{
	public static void main(String args[]) throws Exception 
	{
		File ii = new File ("C-small-attempt1.in");
		FileInputStream fis = new FileInputStream(ii);
		BufferedReader  br = new BufferedReader(new InputStreamReader (fis));
		int cases = Integer.parseInt(br.readLine());
		FileOutputStream fout = new FileOutputStream ("output.txt");
		DataOutputStream dout = new DataOutputStream (fout);
		int total=0;
		for(int i=0;i<cases;i++){
		String temp = br.readLine();
		String parts [] = temp.split(" ");
		int lower = Integer.parseInt(parts[0]);
		int upper = Integer.parseInt(parts[1]);
		System.out.println(lower+" "+upper);
		
		for(int j=lower;j<=upper;j++)
		{
			int abc = j;int length=0;
			if(j<10)continue;
			while (abc!=0){abc/=10;length++;}
			abc=j;
			for(int m=0;m<length-1;m++){
				int shift = abc%10;
				abc=abc/10;
				System.out.println("hi "+j);
				abc=abc+shift*power(10,length-1);
				if(abc<=upper&&shift!=0&&abc>j)total++;
				System.out.println(total);
			}
		}
 		dout.writeBytes("Case #"+(i+1)+ ": "+total+"\n");
 		total=0;
		}//for close
		
	}

	private static int power(int i, int j) {
		int no=1;
		for(int a=0;a<j;a++){no=10*no;}
		return no;
	}
}
import java.util.*;
import java.lang.*;

public class recyce{
   
   public static int count(int A, int B)
   {      
      HashSet<Integer> set;
      int count = 0;
      int n = (int) Math.log10(A)+1; 
      for(int num = A; num <= B; num++)
      {
         int rem = num;
         int base = 1;
         set = new HashSet<Integer>();
         for(int k = 1; k < n; k++)
         {
            base *= 10;
            int love = rem/base + (num%base)*((int)Math.pow(10.,n-k));
            if(love > num && love >= A && love <= B)
            {
                if(!set.contains(love))
                {
                    set.add(love);
                    count++;
               // System.out.println(num + " " + love);
                }
            }
         }
      }
      return count;
   }


   public static void main(String[] args)
   {
      Scanner in = new Scanner(System.in);
      int T = in.nextInt();

      int A,B;
      for(int i = 0; i < T; i++)
      {
         A = in.nextInt();
         B = in.nextInt();
         System.out.println("Case #" + (i+1) + ": " + count(A,B));
      }

   }

}
