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.util.Set;

import com.google.common.collect.Sets;
import com.google.common.io.LineReader;


public class RecycledNumbers {

	public static void main(String[] args) throws NumberFormatException, IOException {
		LineReader lineReader = new LineReader(new FileReader(args[0]));
		FileWriter out = new FileWriter(args[0] + "-out.txt"); 
		
		int t = Integer.parseInt(lineReader.readLine());
		for (int counter = 1; counter <= t; counter++) {
			String[] nums = lineReader.readLine().split(" ");
			int result = compute(Integer.parseInt(nums[0]), Integer.parseInt(nums[1]));
			out.write(String.format("Case #%d: %d\n", counter, result));
		}
		out.close();
	}

	private static int compute(int a, int b) {
		Set<Integer> set = Sets.newHashSet();
		int count = 0;
		for (int n = a; n < b; n++) {
			String nStr = Integer.toString(n);
			set.clear();
			for (int i = 1; i < nStr.length(); i++) {
				String fst = nStr.substring(i);
				String snd = nStr.substring(0, i);
				int m = Integer.parseInt(fst + snd);
				if (m > n && m <= b && !set.contains(m)) {
					set.add(m);
					count++;
				}
			}
		}
		
		return count;
	}
}
