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.*;

public class QualificationRoundC {
    public static int power(int i, int p){
        int k = 1;
        for(int j = 0; j < p; j++)
            k *= i;
        return k;
    }
    public static int recycle(int n, int k){
        int d = power(10, k);
        int e = power(10, numDigits(n) - k);
        int right = n % d;
        int left = n / d;
        return right * e + left;
    }
    public static int numDigits(int n){
        int i = 1, k = 0;
        while(n / i > 0){
            i *= 10;
            k++;
        }
        return k;
    }
    public static Set<Integer> getRecycledNumbers(int n){
        int digits = numDigits(n);
        Set<Integer> recycled = new HashSet<Integer>(digits - 1);
        for(int i = 0; i < digits; i++){
            int m = recycle(n, i);
            recycled.add(m);
        }
        return recycled;
    }
    public static void main(String[] args) throws IOException {
        String inFile = args[0];
        String outFile = args[0].replaceAll("\\.in$", ".out");

        FileInputStream fileInputStream = new FileInputStream(inFile);
        Scanner scanner = new Scanner(fileInputStream);
        FileWriter fileWriter = new FileWriter(outFile);
        BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

        int cases = scanner.nextInt();

        for(int i = 1; i <= cases; i++){
            int A = scanner.nextInt(), B = scanner.nextInt();
            int count = 0;

            for(int n = A; n < B; n++){
                Set<Integer> recycled = getRecycledNumbers(n);
                Iterator<Integer> it = recycled.iterator();
                while(it.hasNext()){
                    int m = it.next();
                    if(n < m && m <= B)
                        count++;
                }
            }

            String answer = String.format("Case #%d: %d\n", i, count);
            System.out.print(answer);
            bufferedWriter.write(answer);
        }

        bufferedWriter.close();
        fileWriter.close();
        scanner.close();
        fileInputStream.close();

    }
}
