import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;


class IOSystem {
	private String filePath;
	private List<String> inputList = new ArrayList<String>();
	private StringBuilder sb = new StringBuilder();
	private int readSize = 0;
	private int appendedSize = 0;
	public IOSystem(String filePath)
	{
		this(filePath," ");
	}
	public IOSystem(String filePath,String sep)
	{
		this.filePath = filePath;
		try {
			BufferedReader br = new BufferedReader(new FileReader(filePath+".in"));
			String line = null;
			while((line=br.readLine())!=null)
			{
				inputList.addAll(Arrays.asList(line.split(sep)));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public int  size(){return inputList.size();}
	public boolean  hasNext(){return readSize < size();}
	public int  nextInt(){return Integer.parseInt(inputList.get(readSize++));}
	public long nextLong(){return Long.parseLong(inputList.get(readSize++));}
	public double nextDouble(){return Double.parseDouble(inputList.get(readSize++));}
	public String nextString(){return new String(inputList.get(readSize++));}
	public <T> void appendAnswer(T answer){sb.append("Case #"+(++appendedSize)+": "+answer.toString()+"\n");};
	public void output(){
		try {
			BufferedWriter bw = new BufferedWriter(new FileWriter(filePath+".ou"));
			bw.write(sb.toString());
			bw.flush();
			System.out.println(sb.toString());
			System.out.println("output ->"+filePath+".ou");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}
