import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

package common;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.LinkedList;
import java.util.Queue;

public class FileTranslatorBasis {

	private int numOfCase;
	private File file;
	Queue<String> dataList = new LinkedList<String>();

	
	
	public static FileTranslatorBasis getInstance(String fname){
		if(fname ==null){
			throw new IllegalArgumentException();
		}
		return new FileTranslatorBasis(new File(fname));
	}
	
	private FileTranslatorBasis(File file) {
		this.file = file;
		read();
	}
	
	private void read(){
		try{
			FileReader fr = new FileReader(this.file);
			BufferedReader br = new BufferedReader(fr);
		
			String line;
			while((line = br.readLine())!=null){
				dataList.add(line);
			}
		}catch(IOException e){
			e.printStackTrace();
		}
		numOfCase = Integer.parseInt(dataList.poll());
	}

	public int getNumOfCase(){
		return numOfCase;
	}
	
	public int getIntData(){
		return Integer.parseInt(dataList.poll());
	}
	
	public int[] getIntDataArray(){
		String[] tmp = getStrDataArray();
		int[] data = new int[tmp.length];
		int i = 0;
		for(String t: tmp){
			data[i++] = Integer.parseInt(t);
		}
		return data;
	}
	
	
	public long getLongData(){
		return Long.parseLong(dataList.poll());
	}
	
	public long[] getLongDataArray(){
		String[] tmp = getStrDataArray();
		long[] data = new long[tmp.length];
		int i = 0;
		for(String t: tmp){
			data[i++] = Long.parseLong(t);
		}
		return data;
	}
	public String getStrData(){
		return dataList.poll();
	}
	
	public String[] getStrDataArray(){
		return dataList.poll().split(" ");
	}

	
	
}
