import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Recycled {
	public static void main(String[] args) throws Exception{
		String inputFile = "C-small-attempt0.in";
		
		BufferedReader input = new BufferedReader(new InputStreamReader(new FileInputStream(inputFile)));
		BufferedWriter output = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("output")));
		long num_cases = Long.parseLong(input.readLine());
		int current_case = 0;
		
		while (current_case < num_cases){
			current_case++;
			
			String[] fields = input.readLine().split(" ");
			int A = Integer.parseInt(fields[0]);
			int B = Integer.parseInt(fields[1]);
			int total = 0;
			
			for (int n = A; n < B; n++){
				for (int m = n+1; m <= B; m++){
					if (isRecycled(n,m)) total++;
				}
			}
			
			System.out.println("Case #" + current_case + ": " + total);
			output.write("Case #" + current_case + ": " + total + "\n");
		}
		output.close();
	}

	private static boolean isRecycled(int n, int m) {
		String sn = ""+n;
		String sm = ""+m;
		if (sn.length() != sm.length()) return false;
		int totaln = 0, totalm = 0;
		for (int i = 0; i < sn.length(); i++){
			totaln += sn.charAt(i);
			totalm += sm.charAt(i);
		}
		if (totaln != totalm) return false;
		for (int i = 0; i < sn.length()-1; i++){
			sm = sm.charAt(sm.length() - 1) + sm.substring(0, sm.length() - 1);
			if (sm.equals(sn)) return true;
		}
		return false;
	}
}

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Scanner;

public class GCJ12QRC
{
	private static int a, b, d;
	private static long c;
	private static String output, newline = System.getProperty("line.separator");

	public static void fun()
	{
		String s;
		int i, j, k;
		c = d = 0;
		for(i=a; i>0; i/=10)
			d++;

		for(i=a; i<b; i++) {
			s = "" + i;
			for(j=1; j<d; j++) {
				k = Integer.parseInt(s.substring(j) + s.substring(0, j));
				if(k>i && k<=b) {
					System.out.println(i + " " + k);
					c++;
				}
			}
		}
	}

	public static void main(String[] args) throws IOException
	{
		long t2, t1 = System.currentTimeMillis();
		output = "";
		Scanner sc = new Scanner(new File("C-small-attempt0.in"));
		int ntc = sc.nextInt();

		for(int w=1; w<=ntc; w++)
		{
			a = sc.nextInt();
			b = sc.nextInt();
			fun();
			output += "Case #" + w + ": " + c + newline;
		}
		sc.close();

		OutputStream fo = new FileOutputStream("C-small-attempt0.out");
		fo.write(output.getBytes());
		fo.close();
		t2 = System.currentTimeMillis();
		System.out.println( "Time in millis : " + (t2-t1) );
	}
}
