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.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Scanner;


public class RecylcedNumbers {

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(new File("input.in"));
		BufferedWriter bfrw = new BufferedWriter(new FileWriter("output.out"));
		
		long N = in.nextLong();
		String output = "";
		for(long i = 0; i < N;i++){
			long A = in.nextLong();
			long B = in.nextLong();
			
			output += "Case #"+(i+1)+": " + solve(A,B) + "\n";
		}
		
		bfrw.write(output);
		in.close();
		bfrw.close();
	}
	
	private static long solve(long A,long B){
		long ans = 0;
		if(B <= 9) return 0;
		HashSet<String> set = new HashSet<String>();
		for(long i = A; i <=B; i++){
			String s = i+"";
			
			for(int j = 0; j < s.length();j++){
				String one = s.substring(s.length()-j);
				String two = s.substring(0,s.length()-j);
	
				if(Integer.parseInt(one+two) <= B && i < Integer.parseInt(one+two)) {
					ans++;
					//System.out.println(s + " --> " + one + two);
					set.add(i+","+Integer.parseInt(one+two));
				}
			}
		}
		
		return set.size();
	}
}
