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 problemC{
	
	public static void main(String args[]) {
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			
			int T = Integer.valueOf(br.readLine());
			int count, a, b, base;
			String line;
			String[] lineSplit;
			for(int i = 0; i < T; i++){
				line = br.readLine();
				lineSplit = line.split(" ");
				count = 0;
				a = Integer.valueOf(lineSplit[0]);
				b = Integer.valueOf(lineSplit[1]);
				base = base(a);
				for(int j = a; j < b; j++){
					count += switchAround(j, b, base);
				}
				System.out.println("Case #" + (i+1) + ": " + count);
			}
			
		} catch(Exception e){
			
		}
	}		int div = 10;

	
	public static int switchAround(int num, int max, int base){
		int copy = num;
		int count = 0;
		ArrayList<Integer> listN = new ArrayList<Integer>();
		for(int i = 1; i < base; i *= 10) {
			if(num % 10 == 0) {
				num = num/10;
				continue;
			}
			num = num/10 + (num % 10) * base;
			if(num <= max && num > copy && !listN.contains(num)) {
				count++;
				listN.add(num);
			}
		}
		return count;
	}
	
	public static int base(int num){
		int base = 1;
		while(num/base != 0){
			base *= 10;
		}
		
		return base/10;
	}
}