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.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.*;

public class Recycle {
	public static void main(String args[]){
				
		Recycle t=new Recycle();
		Scanner sc;
		int T;
		int A, B;
		int temp, len;
		int div, rem, no, goo;
		
		int count = 0;
		try{
			sc = new Scanner(new FileReader("test.txt"));
			T = sc.nextInt();
			//in = new BufferedReader(new FileReader("test.txt"));
			PrintWriter pw = new PrintWriter(new FileWriter("Ans.txt"));

			while(T>0)
			{
				goo=0;
				A = sc.nextInt();
				B = sc.nextInt();
				temp = A;	len=1;
				while(temp>=10)
				{
					temp = temp/10;
					len++;
				}
				System.out.println(A+ " " +B+ " " +len);
				for(int i=A; i<B; i++)
				{
					for(int j=1; j<len; j++){
						rem = i%(int)Math.pow(10,j);
						div = i/(int)Math.pow(10,j);
						no = rem*(int)Math.pow(10, len-j) + div;
						//pw.println(i+ " "+rem+ " " + div+" " +no);
						if(no>A && no<=B && no>i){ 
							//pw.println(i+","+no+","+j);
							goo++;
						}
					}
				}
				
				System.out.println(goo);
				pw.println("Case #"+ ++count +": "+ goo);
				pw.flush();
				
				T--;
			}
			pw.close();
		}catch(Exception e){}

	}
}
