import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.io.*;
import java.util.HashSet;
import java.util.Set;

public class Recycled {
    public static void main(String []args)
    {
        int T,counter = 1;
       try {
         BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("output.txt"))));
           String input = reader.readLine();
            T = Integer.parseInt(input);
            while (T-->0)
            {
                input= reader.readLine();
                String []in = input.split(" ");
                int A,B;
                A=Integer.parseInt(in[0]);
                B=Integer.parseInt(in[1]);
                int numPairs = 0;
                for(int i=A;i<=B;i++)
                {
                    Set<Integer> pairs = new HashSet<Integer>();
                    String num = String.valueOf(i);
                    int currentHighestFaceValue = num.charAt(0);
                    for(int j=num.length()-1;j>0;j--)
                    {
                       if(num.charAt(j)=='0')
                        {
                            continue;
                        }
                       if(num.charAt(j)<currentHighestFaceValue)
                        {

                        }
                        else
                        {
                            String poss = num.substring(j) + num.substring(0,j);
                            int possNum = Integer.parseInt(poss);
                            if(possNum<=B && i<possNum)
                            {
                                pairs.add(possNum);
                            }
                        }
                   }
                        numPairs+=pairs.size();
                    }

                writer.write("Case #"+counter+": "+numPairs+"\n");
                counter++;
            }
           writer.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
