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.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class FileIO {
	public static List<String> readFile(String fileName) {
		List<String> list = new ArrayList<String>();
		try {
			FileReader fr = new FileReader(fileName);
			BufferedReader in = new BufferedReader(fr);
			
			String s; 
			while ( (s=in.readLine()) != null ) {
				list.add(s);
			}
			
			in.close();
			fr.close();
			
		} catch(IOException e) {
			e.printStackTrace();
			System.out.println("ERROR");
		}
		
		return list; 
	}
	
	public static void writeFile(String fileName, List<String> contents) {
		try {
			FileWriter fw = new FileWriter(fileName, false); // overwrite
			BufferedWriter out = new BufferedWriter(fw);

			for (String s : contents) {
				out.write(s);
				out.write("\r\n");
			}

			out.close();
			fw.close(); 

			
		} catch(IOException e) {
			e.printStackTrace();
			System.out.println("ERROR");
		}

	}
}
