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.util.*;
public class c{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		long[] powers = new long[10];
		for(int j = 0; j<10; j++){
			powers[j]=(long)Math.pow(10,j);
		}
		for(int tt = 1; tt<=T; tt++){
			int a =sc.nextInt();
			int b =sc.nextInt();
			int val=0;
			for(int i = a; i<b; i++){
				String s=""+i;
				Set<Long> set = new HashSet<Long>();
				for(int j = 1; j<s.length(); j++){
					long s1 = i/powers[j];
					long s2= i-s1*powers[j];
					long s3=s2*powers[s.length()-j]+s1;
					if(s3>i && s3<=b&& !set.contains(s3)){
						val+=1;
					}
					set.add(s3);
				}
			}
			System.out.println("Case #"+tt+": "+val);
		}
	}
}


