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();
	}

}

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

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author ZuoZhong
 */
public class Recycled {

    public static void main(String[] args) throws FileNotFoundException, IOException {
        File file = new File("C-small-attempt0.in");
        BufferedReader in = new BufferedReader(new FileReader(file));
        BufferedWriter out = new BufferedWriter(new FileWriter("Recycled_output.txt"));
        ArrayList<String> list = new ArrayList();

        int T = Integer.parseInt(in.readLine());

        for (int x = 1; x <= T; x++) {
            int ans = 0;
            list.clear();
            String[] input = in.readLine().split(" ");
            if (Integer.parseInt(input[1]) > 10) {
                int start = Integer.parseInt(input[0]);
                int end = Integer.parseInt(input[1]);
                for (int y = end; y >= start; y--) {
                    String value = Integer.toString(y);
                    for (int z = 0; z < value.length(); z++) {
                        String temp = value + value;
                        //System.out.print(value);
                        temp = temp.substring(z, z + value.length());
                        //System.out.print(" to " + temp);
                        if (temp.charAt(0) == '0') {
                            //skip
                            //System.out.println(" skip");
                        } else if (temp.compareTo(value) == 0) {
                            //skip
                            //System.out.println(" skip");
                        } else if (Integer.parseInt(temp) > end) {
                            //skip
                            //System.out.println(" skip");
                        } else if (Integer.parseInt(temp) < Integer.parseInt(value)) {
                            //skip
                            //System.out.println(" skip");
                        } else {
                            boolean exist = false;
                            try {
                                for (int a = 1; a < value.length(); a++) {
                                    String pre = list.get(ans - a);
                                    if (pre.compareTo(temp) == 0) {
                                        exist = true;
                                        break;
                                    }
                                }
                            } catch (Exception e) {
                            }
                            if (!exist) {
                                ans++;
                                list.add(temp);
                                //System.out.println(" added : " + ans);
                            } else {
                                //System.out.println(" skip");
                            }
                        }
                    }
                }

                for (String v : list) {
                    System.out.print(v + " ");
                }
                System.out.println();
            }
            out.write("Case #" + x + ": " + ans);
            System.out.println("Case #" + x + ": " + ans);
            out.newLine();
        }
        out.close();
    }
}
