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

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author 3mara
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    static int testCases = 0;
    static int a = 0, b = 0;
    static int numDigits;
    static HashMap<Integer, HashMap<Integer, Integer>> table = new HashMap<Integer, HashMap<Integer, Integer>>();

    public static void read() {
        try {
            int index = 1;
            BufferedReader br = new BufferedReader(new FileReader("C-small-attempt0.in"));
            int result = 0;
            testCases = Integer.parseInt(br.readLine());
            while (index <= testCases) {
                String array = (br.readLine());
                a = Integer.parseInt((array.split(" "))[0]);
                b = Integer.parseInt((array.split(" "))[1]);
                numDigits = (array.split(" ")[0]).length();
                if (a == (b) || a < 9) {
                    System.out.println("Case #" + index + ": 0");
                } else {
                    result = 0;
                    table.clear();
                    String temp = "";
                    for (int i = a; i <= b; i++) {
                        for (int j = numDigits - 1; j >= 1; j--) {
                            temp = i + "";
                            int tempint = Integer.parseInt(temp.substring(j) + temp.substring(0, j));
                            if ((tempint <= b) && tempint > i) {
                                if (table.get(i) != null && !table.get(i).containsKey(tempint)) {
//                                System.out.println(temp + "====" + temp.substring(j) + temp.substring(0, j));
                                    result++;
                                } else if (table.get(i) == null) {
                                    table.put(i, new HashMap<Integer, Integer>());
                                    table.get(i).put(tempint, 1);
                                    result++;
                                }
                            }
                        }
                    }
                    System.out.println("Case #" + index + ": " + result);
                }


                index++;
            }
        } catch (IOException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static void main(String[] args) {
//        try {
//            BufferedReader br = new BufferedReader(new FileReader("a.txt"));
//            String[] array = new String[288];
//            String line = "";
//            int i = 0;
//            while ((line = br.readLine()) != null) {
//                array[i] = line;
//                i++;
//            }
//            Arrays.sort(array);
//            for (int j = 0; j < 288; j++) {
//                System.out.println(array[j]);
//            }
//            //        System.out.println();
//            //        System.out.println();
        read();
//            //        System.out.println();
//        } catch (IOException ex) {
//            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
//        }
    }
}
