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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.sql.Types;


public class Recycled {

	/**
	 * @param args
	 * @throws IOException 
	 */
	
	public static  int calc(int a,int b) {
		int result = 0;
		int[] numbers = new int[b-a+1];
		int ncircle = 0;
		int type=1;
		for (int i = a; i <= b; i++) {
			ncircle = 0;
			
			if(numbers[i-a]==0)
			{
				numbers[i-a]=type;
				ncircle = 1;
				int tmp=1;
				int n=0;
				while (i/tmp!=0) {
					tmp*=10;
					++n;
				}
				--n;
				tmp /= 10;
				int cur =i;
				for (int j = n; j >0; --j) {
					int up = cur/10;
					int down = cur%10;
					cur = down * tmp + up;
					if(down!=0)
					{
						int shifted = cur;
						if((shifted>=a) && (shifted <=b))
						{
							if(numbers[shifted-a]==0)
							{
								
								numbers[shifted-a]=type;
								++ncircle;
							}
							
						}
					}
				}
				
				result += (ncircle)*(ncircle-1)/2;
				++type;
			}
		}
		return result;
	}
	
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		BufferedReader bReader  = new BufferedReader(new InputStreamReader(System.in));
		String number = bReader.readLine();
		int num = Integer.parseInt(number);
		for (int i = 0; i < num; i++) {			
			String s = bReader.readLine();
			String[] strs = s.split(" ");
			int A = Integer.parseInt(strs[0]);
			int B = Integer.parseInt(strs[1]);
			System.out.println("Case #"+(i+1)+": "+calc(A, B));
		}

	}

}
