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.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Num {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			String fname = "C-large";
			FileInputStream fstream = new FileInputStream(fname + ".in");
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			String strLine;
			int numCase = 0;
			int i = 0;
			while ((strLine = br.readLine()) != null) {
				if (numCase == 0)
					numCase = Integer.valueOf(strLine);
				else if (strLine.length() > 0)
					runCase(strLine, ++i);
			}
			in.close();
		} catch (Exception e) {// Catch exception if any
			e.printStackTrace();
		}
	}

	static void runCase(String line, int caseNum) {
		String[] borders = line.split(" ");
		int length = borders[0].length();
		int a = Integer.valueOf(borders[0]);
		int b = Integer.valueOf(borders[1]);
		HashSet<String> pairs = new HashSet<String>();
		for (int i = a; i <= b; i++) {
			for (int j = 1; j < length; j++) {
				int pos = (int) Math.pow(10, j);
				int pair = i / pos + (i % pos) * (int) Math.pow(10, length - j);
				if (pair >= a && pair <= b && pair != i) {
					if (i < pair)
						pairs.add(i + "," + pair);
					else
						pairs.add(pair + "," + i);
				}
			}
		}
		System.out.println("Case #" + caseNum + ": " + pairs.size());
	}
}
