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.*;
import java.util.StringTokenizer;

public class CodeJam1 {
	
	static BufferedReader br;
	static PrintWriter pw;
	
	static int a,b,count;
	
	public static void main(String[] args)throws Exception{
		br=new BufferedReader (new FileReader ("in.txt"));
		pw=new PrintWriter (new FileWriter("out.txt"));
		
		int n=Integer.parseInt( br.readLine() );
		for (int i=1;i<=n;i++){
			input();
			work();
			
			pw.printf("Case #%d: %d%n",i,count);
		}
		
		pw.close();
	}
	
	public static void input()throws Exception{
		StringTokenizer data=new StringTokenizer(br.readLine());
		
		a=Integer.parseInt( data.nextToken() );
		b=Integer.parseInt( data.nextToken() );
		count=0;
	}
	
	public static void work(){
		for (int i=a;i<=b;i++){
			StringBuffer sbuf=new StringBuffer(String.valueOf(i));
			
			int create;
			do{
				sbuf.append(sbuf.charAt(0));
				sbuf.deleteCharAt(0);
				create=Integer.parseInt( sbuf.toString() );
				
				if (create>i & create<=b)
					count++;
				
			}while(create!=i);
		}
	}
}