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 de.johanneslauber.codejam.model;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;


/**
 * 
 * @author Johannes Lauber - joh.lauber@googlemail.com
 * 
 */
public abstract class BaseProblem implements IProblem {

	protected List<ICase> listOfCases;
	private BufferedWriter out;
	private int countOutputLines = 0;

	public BaseProblem() {
		try {
			out = new BufferedWriter(new FileWriter("output/output.out"));
		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}
	}

	@Override
	public void setListOfCases(List<ICase> listOfCases) {
		this.listOfCases = listOfCases;
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param stringArray
	 * @return
	 */
	protected int[] toIntArray(String[] stringArray) {
		int[] intArray = new int[stringArray.length];

		for (int i = 0; i < stringArray.length; i++) {
			intArray[i] = Integer.valueOf(stringArray[i]);
		}
		return intArray;
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param line
	 */
	protected void writeToFile(String line) {
		countOutputLines++;
		try {
			out.write("Case #" + countOutputLines + ": " + line);
			out.newLine();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 */
	protected void closeWriter() {
		try {
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}