import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Scanner;


public class CodeJamWriter implements ICounterZeroEvent{
	
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\A-test";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\A-small-attempt0";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\B-test";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\B-small-attempt0";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\B-large";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\C-test";
	public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\C-small-attempt0";
	//public static String inputFile = "C:\\Users\\user\\Desktop\\coejam\\2012-Qualificaton\\C-large";
	
	public int T;
	public Result[] results;

	public static void main(String[] args) {
		CodeJamWriter codeJamWriter = new CodeJamWriter();
		codeJamWriter.readInput();
	}

	private void readInput() {
		Scanner scanner = null;
		File input = new File(inputFile+".in");
		try {
			scanner = new Scanner(input);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		T = scanner.nextInt();
		scanner.nextLine();
		results = new Result[T+1];
		Counter counter = new Counter(T, this);
		for (int i=1;i<=T;++i)
		{
			results[i] = new Result(i);
			Question q = new QuestionC(results[i], counter);
			q.readInput(scanner);
			q.start();
		}
		scanner.close();	
	}

	private void writeOutput() {
		FileOutputStream fos = null;
		PrintStream printer = null;
		File output = new File(inputFile+".out");
		try {
			fos = new FileOutputStream(output);
			printer = new PrintStream(fos);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		for (int i=1;i<=T;++i)
		{
			printer.println(results[i]);
		}
		System.out.println("FINISHED!!!");
		
		printer.close();
		
	}

	@Override
	public void fireEvent() {
		writeOutput();		
	}
	
}
