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 tr0llhoehle.cakemix.utility.googleCodeJam;

import java.text.ParseException;

/**
 * This class is a base class for all concrete problems. It is used to define
 * some methods necessary for the IOManager to work. It is crucial that the
 * addValue-Method gets extended and called (super.addValue(o)) by the extending
 * class.
 * 
 * @author Cakemix
 * @see IOManager
 * @see Solver
 */
public abstract class Problem {

    protected SupportedTypes[] types;
    protected int cntr = 0;
    protected boolean isInitialised = false;

    /**
     * Returns an array of SupportedTypes which define exactly what data is
     * stored in this problem.
     * 
     * The attribute "types" needs to be initialized in the constructor of the
     * extending class.
     * 
     * @return An array of SupportedTypes which define exactly what data is
     *         stored in this problem.
     * @see SupportedTypes
     */
    public SupportedTypes[] getTypes() {
	return types;
    }

    public void addValue(Object o) throws ParseException {
	if (!isInitialised) {
	    cntr++;
	    isInitialised = (cntr == types.length);
	} else {
	    throw new ParseException("Tried to add another value to this Problem even though all values are set.", cntr);
	}
    }
}
