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();
		}
	}
}

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;


public class RecycledNumbers {

	static int t, a, b;
	
	public static void main(String[] args) throws FileNotFoundException {
		Scanner reader = new Scanner(new File("numbers.in"));
		t = reader.nextInt();
		for (int c = 1; c <= t; c++) {
			a = reader.nextInt();
			b = reader.nextInt();
			int cuenta = 0;
			for (int n = a; n < b; n++) {
				cuenta += eval(n);
			}
			System.out.println("Case #"+c+": "+cuenta);
		}
	}
	
	static int eval(int n){
		String s = ""+n;
		int l = s.length();
		int cuenta = 0;
		int nn;
		ArrayList<Integer> nns = new ArrayList<Integer>();
		for (int i = 1; i < l; i++) {
			s = rotar(s);
			if (s.charAt(0)=='0') continue;
			nn = Integer.parseInt(s);
			if (nn>n && nn<=b && !nns.contains(nn)){
				cuenta++;
				nns.add(nn);
			}
		}
		return cuenta;
	}
	
	static String rotar(String s){
		return s.substring(1) + s.charAt(0); 
	}
}
