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


public class Recycle {

	/**
	 * @param args
	 */
	
	static int t =0;
	
	//static ArrayList<ArrayList<String>> table = new ArrayList<ArrayList<String>>();	

		public static void inputF() throws FileNotFoundException{
			
			File inputFile = new File("C-large.in");
			Scanner in = new Scanner(inputFile);
			File outputFile = new File("C-large.out");
			PrintWriter out = new PrintWriter(outputFile);
			String result="";
			String input ="";
	  
			int n,m=0;
			
			t = in.nextInt();
			//System.out.println(n);
			input = in.nextLine();
			for (int i=1; i<=t; i++) {
				 n =in.nextInt();
				 m =in.nextInt();
				//System.out.println("length of the list: "+list.length);
				result = "Case #"+i+ ": "+ count(n,m);
				out.println(result);
			}
			in.close();
			out.close();
		}
	
	private static int count(int n, int m) {
		int result =0;	
		boolean isRecycle = false;
		ArrayList list = new ArrayList<Integer>();
		
		for (int i=n; i<=m;i++){
			String ori=Integer.toString(i);
			isRecycle = false;
			list = new ArrayList<Integer>();
			for(int j=1; j<ori.length();j++){
				String cut = ori.substring(j, ori.length());
				String res = (cut+ori).substring(0, ori.length());
				//System.out.println(res);
				int resInt = Integer.parseInt(res);
				if ((resInt>i)&(resInt<=m)) {
					if ((!isRecycle)|((isRecycle)& (!list.contains(resInt)))){
					result++;
					isRecycle=true;
					list.add(resInt);
					//System.out.println(i+"-->"+resInt);
					//out.println(resInt);
				}
				}
			}
		}
		return result;
		}

	public static void main(String[] args) throws FileNotFoundException {
		inputF();

	}

}
