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.*;
import java.util.*;
public class CSmall {
	public static Set set = new HashSet();
	public static int counter = 0;
	public static void main(String[] args) throws IOException {
		
		Scanner in = new Scanner(new File("C-large.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("C-small.out")));
		
		int T = Integer.parseInt(in.nextLine());
		for (int i = 0; i < T; i++) {
			String[] lim = in.nextLine().split(" ");
			for (int j = Integer.parseInt(lim[0]); j < Integer.parseInt(lim[1]); j++) {
				if (j >= 10) {
					pair(Integer.toString(j), lim);
				}
			}
			
			out.write("Case #"+ (i+1) +": " + set.size());
			if (i != T-1)
				out.write("\n");
			set.clear();
			
		}	
		//System.out.println("1112".charAt("1112".length()-1) + ("1112".substring(0,"1112".length()-1)));

		out.close();
		System.exit(0);
	}
	
	private static void pair(String num, String[] lim) {
		int len = num.length();
		int upLim = Integer.parseInt(lim[1]), lowLim = Integer.parseInt(lim[0]);
		String k = num;
		for (int i = 0; i < len; i++) {
			num = num.charAt(len-1) + num.substring(0,len-1);
			//System.out.println(num + " " + k);
			//System.out.println(num);
			
			int a = Integer.parseInt(num), b = Integer.parseInt(k);
			
			if (a!=b && a <= upLim && a >= lowLim && b <= upLim && b >= lowLim) {
				if (a<b) {
					set.add(num+" "+k);
				} else {
					set.add(k+" "+num);
				}
			}
		}
		
	}
}