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();
	}
}

package gcj2012;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;

/**
 * Google Code Jam 2012 C - Recycled Numbers
 * 
 * @author Ruli Manurung (maruli@cs.ui.ac.id)
 */
public class QC
{
	public static void main(String[] args) throws FileNotFoundException,
			IOException
	{
		String fileName = args[0];
		BufferedReader input = new BufferedReader(new FileReader(fileName));

		StringTokenizer token = new StringTokenizer(input.readLine());
		int t = Integer.parseInt(token.nextToken());

		for (int ii = 0; ii < t; ii++)
		{
			token = new StringTokenizer(input.readLine());
			int a = Integer.parseInt(token.nextToken());
			int b = Integer.parseInt(token.nextToken());
			
			int recycled = 0;
			
			for(int jj=a; jj<b; jj++)
				for(int kk=jj+1; kk<=b; kk++)
					if(recyclable(jj,kk)) recycled++;
					
			System.out.println("Case #" + (ii + 1) + ": "
					+ recycled);
		}
		input.close();
	}
	
	static boolean recyclable(int jj, int kk)
	{
		String sjj = jj+"";
		int length = sjj.length();
		for(int ii=1; ii<sjj.length(); ii++)
		{
			String nu = sjj.substring(length-ii) + sjj.substring(0, length-ii);
			if(Integer.parseInt(nu)==kk) return true;
		}
		return false;
	}
}
