import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
import java.util.*;
import java.io.*;
class Caso{
	int a;
	int b;
	public void leer(Scanner s){
		a=s.nextInt();
		b=s.nextInt();
	}
	public Caso(){
	}
	public String obtenerRespuesta(){
		long resultado=0;
		for(int i=a;i<=b;i++){
			int j=1;
			int nd=(int)Math.log10(i)+1;
			HashMap<Integer,Integer>h=new HashMap<Integer,Integer>();
			while(j<nd){
				int d=(int)Math.pow(10,j);
				int r=i%d;
				int sg=(i-r)/d;
				int mt=(int)(r*Math.pow(10,nd-j))+sg;
				if(h.get(mt)==null&&i<mt&&mt<=b){
					h.put(mt,1);
					resultado++;
				}
				j++;
			}
		}
		return resultado+"";
	}
}
public class Caso1{
	public void iniciar(){
		Scanner s=null;
		PrintStream ps=null;
		try{
			ps=new PrintStream(new FileOutputStream(new File("output.txt")));
			s=new Scanner(new FileReader("input.txt"));
			StringBuffer entrada=new StringBuffer();
			while(s.hasNextLine()){
				entrada.append(s.nextLine()+"\n");
			}
			s=new Scanner(entrada+"");
		}catch(Exception e){
			e.printStackTrace();
		}
		int numeroCasos=s.nextInt();
		Caso[]casos=new Caso[numeroCasos];
		for(int i=0;i<numeroCasos;i++){
			casos[i]=new Caso();
		}
		for(int k=0;k<numeroCasos;k++){
			casos[k].leer(s);
		}
		for(int i=0;i<casos.length;i++){
			ps.println("Case #"+(i+1)+": "+casos[i].obtenerRespuesta());
		}
	}
	public static void main(String[]args){
		(new Caso1()).iniciar();
	}
}