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();
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package google.code.jam.recycled.numbers;

import java.io.*;
import java.util.ArrayList;

/**
 *
 * @author Lucas
 */
public class Utils {
    
    public ArrayList<Integer[]> parse(String file) {

        BufferedReader in = null;
        ArrayList<Integer[]> list = new ArrayList<Integer[]>();
        int size;

        try {

            in = new BufferedReader(new InputStreamReader(new DataInputStream(new FileInputStream(file))));
            size = Integer.parseInt(in.readLine());

            for (int n = 0; n < size; n++) {

                String[] stringCases = in.readLine().split("\\s+");

                Integer[] cases = new Integer[2];
                cases[0] = Integer.parseInt(stringCases[0]);
                cases[1] = Integer.parseInt(stringCases[1]);
                
                list.add(cases);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return list;
    }

    public void write(ArrayList<Integer> output, String file) {

        BufferedWriter out = null;

        try {

            out = new BufferedWriter(new FileWriter(file));

            for (int n = 0; n < output.size() - 1; n++) {
                out.write("Case #" + (n + 1) + ": " + output.get(n));
                out.newLine();
            }
            out.write("Case #" + output.size() + ": " + output.get(output.size() - 1));

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.flush();
                    out.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
    
}
