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){}
	}
}
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.StringTokenizer;



public class RQC {
	
	private static BufferedReader in;
	private static PrintWriter out;
	private static StringTokenizer input;
	
	
	public static void main(String[] args) throws IOException {
		//Initializing ...
	 	new RQC();
		//-------------------------------------------------------------------------
		int testCases = nextInt();
		int counter=0;
		while (testCases -- > 0){
			counter++;
			//Here put the code..:)
			int a = nextInt();
			int b = nextInt();
			int ret=0;
			for (int i = a; i <= b; i++) {
				char [] aa = (""+i).toCharArray();
				for (int j = 1; j < aa.length; j++) {
					char [] z = new char[aa.length];
					for (int k = 0; k < z.length; k++) {
						z[k]=aa[(k+j)%aa.length];
					}
					int s = Integer.parseInt(new String(z));
					if(s>i&&s<=b)ret++;
				}
			}
			
			writeln("Case #"+counter+": "+ret);
		}
		//-------------------------------------------------------------------------
		//closing up
		end();
		//--------------------------------------------------------------------------

	}
	
	private static boolean cir(String a, String b) {
		// TODO Auto-generated method stub
		for (int i = 0; i < a.length(); i++) {
			boolean t = true;
			for (int j = 0; j < a.length(); j++) {
				if(a.charAt(j)!=b.charAt((j+i)%b.length())){t=false;break;}
			}
			if(t)return true;
		}
		return false;
	}

	

	public RQC() throws IOException {
		//Input Output for Console to be used for trying the test samples of the problem 
		in = new BufferedReader(new InputStreamReader(System.in));
//		out = new PrintWriter(System.out);
		//-------------------------------------------------------------------------
		//Input Output for File to be used for solving the small and large test files
//		in = new BufferedReader(new FileReader("RQC.in"));
		out = new PrintWriter("RQC.txt");
		//-------------------------------------------------------------------------
		//Initalize Stringtokenizer input
		input = new StringTokenizer(in.readLine());
	}

	private static int nextInt() throws IOException {
		if (!input.hasMoreTokens())input=new StringTokenizer(in.readLine());
		return Integer.parseInt(input.nextToken());
	}
	private static long nextLong() throws IOException {
		if (!input.hasMoreTokens())input=new StringTokenizer(in.readLine());
		return Long.parseLong(input.nextToken());
	}
	private static double nextDouble() throws IOException {
		if (!input.hasMoreTokens())input=new StringTokenizer(in.readLine());
		return Double.parseDouble(input.nextToken());
	}
	private static String nextString() throws IOException {
		if (!input.hasMoreTokens())input=new StringTokenizer(in.readLine());
		return input.nextToken();
	}
	private static void write(String output){
		out.write(output);
		out.flush();
	}
	private static void writeln(String output){
		out.write(output+"\n");
		out.flush();
	}
	private static void end() throws IOException{
		in.close();
		out.close();
		System.exit(0);
	}
	
}
