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.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;



public class CRecycledNumbers {
	
	static int recycle(int a, int b) {
//		System.out.println("-------------------------");
//		System.out.println(a + " " + b);
		int count = 0;
		Set<String> used = new HashSet<String>();
		for(int i = a; i < b; ++i) {
			String s = Integer.toString(i);
			for(int j = 1; j < s.length(); ++j) {
				String pre = s.substring(0, j);
				String suf = s.substring(j);
				if(suf.startsWith("0")) continue;
				int c = Integer.parseInt(suf + pre);
				if(c <= b && c != i && i < c) {
					String p = i < c? (i + "-" + c) : (c + "-" + i);
					if(!used.contains(p)) {
						used.add(p);
//						System.out.println(p);
						++count;
					}
				}
			}
			
		}
		
		return count;
	}
	
	public static void main(String[] args) throws NumberFormatException, IOException {
		String filename = "C-large.in";
		BufferedReader r = new BufferedReader(new FileReader(filename));
		int n = Integer.parseInt(r.readLine());
		PrintWriter p = new PrintWriter("c.out");
		for(int i = 0; i < n; ++i) {
			String[] test = r.readLine().split(" ");
			int j = i + 1;
			p.println("Case #" + j + ": " +  recycle(Integer.parseInt(test[0]), Integer.parseInt(test[1])));
			
		}
		p.flush();
		p.close();
	}

}
