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.*;

public class Java{

	public static void main(String[] args) {
		try {
			BufferedReader in = new BufferedReader(new FileReader("C-large.in"));
			int cases = Integer.parseInt(in.readLine());
			for (int i = 1; i <= cases; i ++){
				String[] temp = (in.readLine()).split(" ");
				int A = Integer.parseInt(temp[0]);
				int B = Integer.parseInt(temp[1]);
				logic(A, B, i);
			}
			in.close();
		} catch (IOException e) {
			System.out.println("INPUT ERROR");
		}
	}

	public static void logic(int A, int B, int caseNum){
		int num = A, result = 0;
		while (num < B){
			int factor = 10;
			int toFront = num%factor;
			int toBack = num/factor;
			int prev = -1;
			while (toFront < num){
				int x = Integer.parseInt(toFront+""+toBack);
				if (x > num && x <= B && x != prev){
					result ++;
					prev = x;
				}
				factor *= 10;
				toFront = num%factor;
				toBack = num/factor;
			}
			num ++;
		}
		System.out.println("Case #" + caseNum + ": " + result);
	}
}