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();
    }
}

package googlecodejam;

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

public class Qualification_C {

	private static String inFile = "C://CodeJam/QCin.txt";
	private static String outFile = "C://CodeJam/QCout.txt";
	private static BufferedWriter writer;

	public static void main(String[] args) {
		try{
			writer = new BufferedWriter(new FileWriter(outFile));
			readInput();
			writer.close();
		}catch(Exception e){
			e.printStackTrace();
		}
	}
	
	private static void readInput(){
		try{
			FileInputStream fstream = new FileInputStream(inFile);
			// Get the object of DataInputStream
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			String strLine;
			
			// test num
			strLine = br.readLine();
			int numTest = Integer.parseInt(strLine);
			
			for (int i = 0; i<numTest; i++){
				strLine = br.readLine();
				String[] num = strLine.split(" ");
				int a = Integer.parseInt(num[0]);
				int b = Integer.parseInt(num[1]);
				int count = 0;
				for (int j=a; j<b; j++){
					String str = Integer.toString(j);
					HashSet<Integer> list = swap(str);
					for (int x : list){
						if (x >j && x<=b){
							count ++;
						}
					}
				}
				println("Case #" + (i+1) + ": " + count);
			}
			
			//Close the input stream
			in.close();
		}catch (Exception e){
			e.printStackTrace();
		}
	}

	private static HashSet<Integer> swap(String str){
		HashSet<Integer> list = new HashSet<Integer>();
		for (int i=1; i<str.length(); i++){
			String x = str.substring(i, str.length()) + str.substring(0, i);
			list.add(Integer.parseInt(x));
		}
		return list;
	}

	public static void println(String msg) throws IOException {
		System.out.println(msg);
        writer.write(msg);
		writer.newLine();   // Write system dependent end of line.
    }
}
