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.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class Main_Recycled {
	static int a,b;
	public static void main(String[] args)throws Exception {
		File _=new File("recycled.in");
		BufferedReader br=_.exists()? new BufferedReader(new FileReader(_)):new BufferedReader(new InputStreamReader(System.in));
		int t=Integer.parseInt(br.readLine().trim());
		StringTokenizer st;
		
		boolean visited[];
		int size,total;
		int temp;
		for (int i = 1; i <= t; i++) {
			total=0;
			st=new StringTokenizer(br.readLine());
			a=Integer.parseInt(st.nextToken());
			b=Integer.parseInt(st.nextToken());
			visited=new boolean[b+1];
			for (int j = a; j <= b; j++) {
				size=0;
				temp=j;
				while(!visited[temp]){
					visited[temp]=true;
					size++;
					temp=next(temp);
				}
				total+=size*(size-1)/2;
				
				
			}
			System.out.println("Case #"+i+": "+total);
		}
	}

	private static int next(int temp) {
		String str=""+temp;
		do{
			str=str.substring(1,str.length())+str.charAt(0);
		}
		while(Integer.parseInt(str)<a||Integer.parseInt(str)>b);
		return Integer.parseInt(str);
	}
}
