import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.util.Arrays;
import java.util.Scanner;

public class Read {
	int noOfTestCases;
	
	
int []nums;
	public void test() throws FileNotFoundException{
		File file = new File("out");
		File file2 = new File("out2");
		Scanner scanner = new Scanner(file);
		Scanner scanner2 = new Scanner(file2);
		while(scanner.hasNext()){
			String l1 = scanner.nextLine();
			String l2 = scanner2.nextLine();
			if(!l2.equals(l1)){
				System.out.println(l1);
				System.out.println(l2);
				System.out.println("wrong");
			}
		}
	}

	public void Read(String name) {
		File file = new File(name);

		try {

			Scanner scanner = new Scanner(file);
			String line = scanner.nextLine();
			noOfTestCases = Integer.parseInt(line);
			nums =  new int[noOfTestCases*2];
			int i=0;
			while(i<noOfTestCases){
			line = scanner.nextLine();
			line=line.replaceAll("  ", "");
			String []numS = line.split(" ");
			nums[2*i]=Integer.parseInt(numS[0]);
			nums[2*i+1]=Integer.parseInt(numS[1]);
			i++;
			}
		} catch (FileNotFoundException e) {

		}

	}
	public void write(String fname,String data)
	{
		try{
			  // Create file 
			  FileWriter fstream = new FileWriter(fname);
			  BufferedWriter out = new BufferedWriter(fstream);
			  out.write(data);
			  //Close the output stream
			  out.close();
			  }catch (Exception e){//Catch exception if any
			  System.err.println("Error: " + e.getMessage());
			  }
	}
public static void main(String[] args) throws FileNotFoundException {
	Read r = new Read();
	r.test();
//	for (int i = 0; i < 50; i++) {
//		System.out.println("1000000 2000000");
//	}
}
}
