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();
		}
	}
}

/**
 * @(#)Main.java
 *
 *
 * @author 
 * @version 1.00 2012/4/14
 */
import java.io.*;

public class Main {
	
	public static void main(String...args)throws IOException {
		BufferedReader br = new BufferedReader(new FileReader("C-large.in"));
        FileWriter fstream = new FileWriter("C-large.out");
        BufferedWriter out = new BufferedWriter(fstream);
        String in = br.readLine();
        int testCases = Integer.parseInt(in);
        int i = 1;
        
        while(testCases > 0) {
        	in = br.readLine();
        	out.write("Case #" + i + ": " + solve(in) + "\n");
        	testCases--;
        	i++;
        }
        out.close();
	}
	
	public static int solve(String in) {
		String[] data = in.split(" ");
		int a = Integer.parseInt(data[0]);
		int b = Integer.parseInt(data[1]);
		
		int solution = 0;
		
		for(int i = a; i < b; i++) {
			int tmp = i;
			
			do{
				tmp = shift(tmp);
				while (Math.floor(Math.log10(i)) != Math.floor(Math.log10(tmp))){
					tmp *= 10;
				}
				if(tmp > i && tmp <= b){
					solution++;
				}
			}while(tmp != i);
		}
		return solution;
	}
	
	public static int shift(int a){
		int E = firstDigit(a);
		int T = 10 * trailing(a);
		return E + T;
	}
	
	public static int trailing(int x) {
		if (x == 0) return 0;
		return (int) Math.floor(x % Math.pow(10, Math.floor(Math.log10(x))));
	}
	
	public static int firstDigit(int x) {
  		if (x == 0) return 0;
  		return (int) Math.floor(x / Math.pow(10, Math.floor(Math.log10(x))));
	}
    
}