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.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;


public class Main {
	
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(new FileReader("input.txt"));
		PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));
		int tn = sc.nextInt();
		sc.nextLine();
		for(int i = 0; i < tn; i++) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			int res = 0;
			for(int t = a; t <= b; t++) {
				String oppa = t + "";
				int len = (t + "").length();
				for (int u = 0; u + 1 < len; u++) {
					if(oppa.charAt(u + 1) != '0') {
						int v = Integer.parseInt(oppa.substring(u + 1, len) + oppa.substring(0, u + 1));
						if (t == v)
							break;
						if (a <= v && v <= b) {
							res++;
						}
					}
				}
			}
			pw.print("Case #" + (i + 1) + ": " + (res / 2));
			pw.println();
		}
		pw.close();
	}
}
