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.InputStreamReader;


public class RecycledPairs {
	public static void main(String []args) throws NumberFormatException, IOException{
		BufferedReader in = new BufferedReader(new FileReader("input.in"));
		String hm="", line[];
		int n =Integer.valueOf(in.readLine()), m=1, a, b, c;
		for(m=1;m<=n;m++){
			System.out.print(m+" ");
			line=in.readLine().split(" ");
			a=Integer.valueOf(line[0]); b=Integer.valueOf(line[1]);
			c=0;
			for(int i=a;i<b;i++){
				for(int j=i+1;j<=b;j++){
					//System.out.println("ANA: "+i+" "+j);
					if(recycled(String.valueOf(i),String.valueOf(j))) c++;
				}
			}
			hm+="Case #"+m+": "+c+"\n";
		}
		System.out.println();
		System.out.println(hm);
	}

	private static boolean recycled(String n, String m) {
		String aux=""; int li=0;
		int leng=n.length();
		//System.out.println("Length: "+leng);
		if(leng==1) return false;
		for(int i=leng-1;i>0;i--){
			aux=String.valueOf(n.charAt(leng-1));
			aux+=n.substring(0, leng-1);
			n=aux;
			//System.out.println(aux+" "+m);
			if(n.equals(m))
				return true;
		}
		return false;
	}
}
