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.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.util.Arrays;
import java.util.Scanner;

public class Read {
	int noOfTestCases;
	
	
int []nums;
	public void test() throws FileNotFoundException{
		File file = new File("out");
		File file2 = new File("out2");
		Scanner scanner = new Scanner(file);
		Scanner scanner2 = new Scanner(file2);
		while(scanner.hasNext()){
			String l1 = scanner.nextLine();
			String l2 = scanner2.nextLine();
			if(!l2.equals(l1)){
				System.out.println(l1);
				System.out.println(l2);
				System.out.println("wrong");
			}
		}
	}

	public void Read(String name) {
		File file = new File(name);

		try {

			Scanner scanner = new Scanner(file);
			String line = scanner.nextLine();
			noOfTestCases = Integer.parseInt(line);
			nums =  new int[noOfTestCases*2];
			int i=0;
			while(i<noOfTestCases){
			line = scanner.nextLine();
			line=line.replaceAll("  ", "");
			String []numS = line.split(" ");
			nums[2*i]=Integer.parseInt(numS[0]);
			nums[2*i+1]=Integer.parseInt(numS[1]);
			i++;
			}
		} catch (FileNotFoundException e) {

		}

	}
	public void write(String fname,String data)
	{
		try{
			  // Create file 
			  FileWriter fstream = new FileWriter(fname);
			  BufferedWriter out = new BufferedWriter(fstream);
			  out.write(data);
			  //Close the output stream
			  out.close();
			  }catch (Exception e){//Catch exception if any
			  System.err.println("Error: " + e.getMessage());
			  }
	}
public static void main(String[] args) throws FileNotFoundException {
	Read r = new Read();
	r.test();
//	for (int i = 0; i < 50; i++) {
//		System.out.println("1000000 2000000");
//	}
}
}
