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.FileReader;
import java.util.HashSet;
import java.util.Set;


public class ProblemB {

	public static void main(String[] args) {
		try {
			BufferedReader bufReader = new BufferedReader(new FileReader(args[0]));
		
			int numOfCases = Integer.parseInt(bufReader.readLine());
			int a, b;
			for (int i = 0; i < numOfCases; i++) { // should change 2 to numOfCases!!!
				Set<String> distinctRecycledPairs = new HashSet<String>();
				String line = bufReader.readLine();
				a = Integer.parseInt(line.substring(0, line.indexOf(' ')));
				b = Integer.parseInt(line.substring(line.indexOf(' ') + 1, line.length()));
				//System.out.println("A = " + a + " B = " + b);
				for (int j = a; j <= b; j++) {
					String n = "" + j;
					for (int k = 1; k < n.length(); k++) {
						String possibleM = n.substring(k) + n.substring(0, k);
						if (Integer.parseInt(possibleM) > Integer.parseInt(n)  && Integer.parseInt(possibleM) >= a && Integer.parseInt(possibleM) <= b) {
							// the pair (n,m) may repeat, so use a set
							// there should be a better way though
							distinctRecycledPairs.add(n + " " + possibleM);
						}
					}
				}
				System.out.println("Case #" + (i+1) + ": " + distinctRecycledPairs.size());
			}
			
			bufReader.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}
