import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class codejamp3 {
	public static char[] map;
	public static void main(String[] args) throws IOException{
		readFile();
	}

	public static String getResult(String input){
		int resultInt = 0;
		Set<Integer> exist = new HashSet<Integer>();
		String[] splitResult = input.split(" ");
		int numberA = Integer.parseInt(splitResult[0]);
		int numberB = Integer.parseInt(splitResult[1]);
		for(int i = numberA; i < numberB; i++){
			int current = i;
			exist.clear();
			int length1 = String.valueOf(current).length();
			int j = 10;
			while(j<=current){
				int remain = current%j;
				int length2 = String.valueOf(j).length(); 
				double b = Math.pow(10, length2-1);
				double a = Math.pow(10,length1);
				int currentResult = (int)(remain*a/b+current/j);
				if(current == 2022){
					System.out.println(remain+":"+(length2-1)+":"+currentResult);
				}
				if(currentResult <= numberB && currentResult > current){
					if(!exist.contains(currentResult)){
						exist.add(currentResult);
						resultInt++;
					}
				}
				j = j*10;
			}
		}
		return ""+resultInt;
	}
	public static void readFile() throws IOException{
			FileWriter fstream = new FileWriter("out.txt");
			BufferedWriter out = new BufferedWriter(fstream);
            FileReader input = new FileReader("in.txt");
            BufferedReader bufRead = new BufferedReader(input);	
            String line = bufRead.readLine();
            String current = getResult(line);
            int i = 1;
            out.write("Case #" + i + ": " + current);
            line = bufRead.readLine();
            while (line != null){
            	i++;
          	  	out.write('\n' + "Case #" + i + ": " + getResult(line));
          	  	line = bufRead.readLine();
            }             
            bufRead.close();
            out.close();
	}
}
