import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author ZAMAN
 */
import java.io.*;

public class test2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
       
        int start;
        int end;
        try {
            BufferedReader a = new BufferedReader(new FileReader("C-large.in"));
            BufferedWriter b = new BufferedWriter(new FileWriter("C-large.out"));
            
            int lines = Integer.valueOf(a.readLine());
            for (int z = 1; z <= lines; z++) {
                 int pairs = 0;
                String ints[] = a.readLine().split(" ");
                start = Integer.parseInt(ints[0]);
                end = Integer.parseInt(ints[1]);
                b.append("Case #" + z + ": ");
                for (int i = start; i <= end; i++) {
                    String number = String.valueOf(i);
                    int length = number.length();
                    int newnums[] = new int[length - 1];
                    int count = 0;
                    if (length == 1) {
                        continue;
                    }
                    if (length == 2) {

                        char ch1 = number.charAt(0);
                        char ch2 = number.charAt(1);
                        if (ch1 < ch2) {
                            String num = "";
                            //interchange
                            num += ch2 + "" + ch1;
                            int newnum = Integer.parseInt(num);

                            if (newnum <= end) {
                                pairs++;
                            }
                        }
                    }
                    if (length > 2) {
                        
                        //mving one character to the front
                        String num = "";
                        char ch = number.charAt(length - 1);
                        num += ch;
                        num += number.substring(0, length - 1);
                        int newnum = Integer.parseInt(num);
                        if (newnum > i && newnum <= end) {
                            if (count == 0) {
                                newnums[count] = newnum;
                                count++;
                                pairs++;
                            } else {
                                int k = 0;
                                for (; k < length - 1; k++) {
                                    if (newnums[k] == newnum) {
                                        break;
                                    }
                                }
                                if (k == length - 1) {
                                    pairs++;
                                }
                            }

                        }

                        for (int j = length - 2; j > 0; j--) {
                            //moving more than once
                            String mov = number.substring(j, length);
                            num = "";
                            num += mov;
                            num += number.substring(0, j);
                            newnum = Integer.parseInt(num);

                            if (newnum > i && newnum <= end) {
                                if (count == 0) {
                                    newnums[count] = newnum;
                                    count++;
                                    pairs++;
                                } else {
                                    int k = 0;
                                    for (; k < length - 1; k++) {
                                        if (newnums[k] == newnum) {
                                            break;
                                        }
                                    }
                                    if (k == length - 1) {
                                        pairs++;
                                    }
                                }
                            }


                        }
                    }


                }
                
                b.append("" + pairs);
                b.newLine();
            }

            b.flush();
            a.close();
            b.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
