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 com.elbr.codejam2012.qualification.C;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URL;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;

public class Recycle {
	private static int a = 0;

	private static int b = 0;

	private static boolean debug = false;

	private static HashSet<String> set = new HashSet<String>();

	private static void isRecycled(int i) {
		String s = i + "";

		LinkedList<String> l = new LinkedList<String>();
		for (int j = 0; j < s.length(); j++) {
			l.add(s.charAt(j) + "");
		}

		for (int j = 0; j < s.length(); j++) {
			String zs = listToString(l);

			if (debug) {
				System.out.println(zs);
			}

			int z = Integer.parseInt(zs);

			if ((z >= a) && (z <= b) && (z > i)) {
				set.add("{" + i + "," + z + "}");
			}

			l.add(l.getFirst());
			l.removeFirst();
		}
	}

	private static String listToString(List<String> l) {
		return l.toString().replace("[", "").replace("]", "").replace(" ", "")
				.replace(",", "");
	}

	public static void main(String[] in) throws IOException {
		String fileName = "C-small-attempt0.in";
		URL file = Recycle.class.getResource(fileName);
		String path = file.getFile();
		BufferedReader reader = new BufferedReader(new FileReader(path));

		File fileOut = new File(fileName + ".out");
		fileOut.createNewFile();
		BufferedWriter writer = new BufferedWriter(new FileWriter(fileOut));

		int numOfCases = Integer.parseInt(reader.readLine());

		for (int t = 0; t < numOfCases; t++) {
			String line = reader.readLine();

			String outputLine = "Case #" + (t + 1) + ": " + result(line);

			System.out.println(outputLine);

			writer.write(outputLine + System.getProperty("line.separator"));
		}

		reader.close();
		writer.close();
	}

	private static int result(String line) {
		String[] params = line.split("\\s");
		a = Integer.parseInt(params[0]);
		b = Integer.parseInt(params[1]);

		set.clear();

		for (int i = a; i <= b; i++) {
			isRecycled(i);
		}

		return set.size();
	}
}
