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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

/*
 * 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();
        }
    }
}
