import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

package student;

import java.io.*;
import java.util.*;

public class test {
	
	public static int getShift(String t, int pos)
	{
		int len = t.length()/2;
		return Integer.parseInt(t.substring(pos,pos+len));
	}
	
	public static void main(String[] args) throws IOException
	{
		
		Scanner fin = new Scanner(new File("C-large.in"));
		PrintWriter out = new PrintWriter (new BufferedWriter (new FileWriter ("ans.txt")));
		    
		int ncase = fin.nextInt();
		
		int a=0,b=0;
		
		for(int cc = 1; cc<=ncase;cc++)
		{
			a= fin.nextInt();
			b= fin.nextInt();
			HashSet<Pair> set = new HashSet<Pair>();
			for(int i=a;i<=b;i++)
			{
				String t = (""+i) + (""+i);
				int len = t.length()/2;
				for(int j=1;j<len;j++)
				{
					int p = getShift(t, j);
					if(p>=a&&p<=b&&(""+p).length()==len && p!=i)
						set.add(new Pair(i,p));
				}
			}
			out.println("Case #" + cc + ": " + set.size()/2);
		}
		out.close();
			
	}
}
class Pair
{
	public int a,b;
	public Pair(int x,int y)
	{
		a=x;b=y;
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + a;
		result = prime * result + b;
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Pair other = (Pair) obj;
		if (a != other.a)
			return false;
		if (b != other.b)
			return false;
		return true;
	}
}
