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();
		}
	}
}

package codejam;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

/**
 * ´ÓÎÄ±¾¶ÁÈ¡ÊäÈë
 * @author Administrator
 *
 */
public class InOutTool extends ArrayList<String> {
	private String inPath ;
	private String outPath;
	public String outText(String path){
		this.outPath = path;
		return outText();
	}
	public String outText(){
		StringBuffer sb = new StringBuffer();
		PrintWriter out = null;
		try {
			out = new PrintWriter(new File(outPath).getAbsoluteFile());
			for(String s:this){
				out.println(s);
				sb.append(s);sb.append("\n");
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			if(null!=out){
				out.close();
			}
		}
		return sb.toString();
	}
	public String readText(String inPath){
		StringBuffer sb = new StringBuffer();
		BufferedReader in = null;
		try {
			in = new BufferedReader(new FileReader(new File(inPath).getAbsoluteFile()));
			String s;
			while((s = in.readLine()) != null){
				s = s.trim();
				add(s);//Ã¿Ò»ÐÐ×÷ÎªArrayListµÄÒ»¸öÔªËØ
				sb.append(s);sb.append("\n");
			}
		}catch (FileNotFoundException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			if(null!=in){
				try {
					in.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		return sb.toString();
	}
	public InOutTool(String inPath,String outPath){
		this.inPath = inPath;this.outPath = outPath;
		readText(inPath);
		if((size()!=0)&&get(0).equals("")) remove(0);
	}
}
