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 com.google.code;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public abstract class GCJ {

	private BufferedReader input;
	private BufferedWriter output;
	String inputLine;
	String[] brokenUpInputLine;
	public static final String FOLDER = "/tmp/";
	
	
	protected GCJ() throws IOException {
		String subclass = this.getClass().getSimpleName();		
		input = new BufferedReader(new FileReader(new File(FOLDER, subclass+".in")));
		output = new BufferedWriter(new FileWriter(new File(FOLDER, subclass+".out")));
	}

	public void run() throws NumberFormatException, IOException {
		int loop = Integer.valueOf(input.readLine());
		for (int i = 0; i < loop; i++)
			answering(i+1);
		output.flush();
	}

	protected void write(String s) throws IOException {
		System.out.print(s);
		output.write(s);
	}
	protected void writeln(String s) throws IOException {
		System.out.println(s);
		output.write(s+"\n");
	}
	protected void writeln() throws IOException {
		System.out.println();
		output.write("\n");
	}
	protected void write(int s) throws IOException {
		System.out.print(String.valueOf(s));
		output.write(String.valueOf(s));
	}
	protected void writeln(int s) throws IOException {
		System.out.println(String.valueOf(s));
		output.write(String.valueOf(s)+"\n");
	}
	
	protected void readLine() throws IOException {
		inputLine = input.readLine();
		brokenUpInputLine = inputLine.split(" ");
	}
	
	protected String getStringInput(int i) {
		return brokenUpInputLine[i];
	}
	
	protected int getIntInput(int i) {
		return Integer.parseInt(brokenUpInputLine[i]);
	}
	
	protected long getLongInput(int i) {
		return Long.parseLong(brokenUpInputLine[i]);
	}
	
	protected double getDoubleInput(int i) {
		return Double.parseDouble(brokenUpInputLine[i]);
	}

	private void answering(int ordinalityOfProblem) throws IOException {
		writeOrdinalityOfAnswer(ordinalityOfProblem);
		code(ordinalityOfProblem);
	}
	private void writeOrdinalityOfAnswer(int ordinalityOfProblem) throws IOException {
		write("Case #"+ordinalityOfProblem+": ");
	}
	
	protected abstract void code(int count) throws IOException;

}
