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.util.*;

public class Recycle
{
    public static void main(String args[])
    {
        int uBound, lBound, count=0, caseNo=1;

        Scanner input = new Scanner(System.in);

        input.nextLine();

        while(true)
        {
            lBound = input.nextInt();
            uBound = input.nextInt();

            for(int i=lBound; i<=uBound; i++)
            {
                int numDigits = new Integer(i).toString().length();
                int[] pastPairs = new int[numDigits-1];
                for(int j=1; j<numDigits; j++)
                {
                    int rotatedInt = rotateInt(i,j);
                    if(rotatedInt>i && rotatedInt<=uBound)
                    {
                        for(int k=0; k<numDigits-1; k++)
                        {
                            if(rotatedInt==pastPairs[k])
                            {
                                count--;
                            }
                        }
                        count++;
                    }
                    pastPairs[j-1] = rotatedInt;
                }
            }
            System.out.printf("Case #%d: %d\n",caseNo,count);
            count=0; caseNo++;
        }
    }

    static int rotateInt(int number, int rotate)
    {
        String numStr = new Integer(number).toString();
        String last = numStr.substring(numStr.length()-rotate);
        String rest = numStr.substring(0,numStr.length()-rotate);
        numStr = last.concat(rest);
        return Integer.parseInt(numStr);
    }
}

// Called with java Recycle < in.in > out.txt
