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.io.*;

class Programa
{
	
public static long procesar(String linea)
{
	String vals[]=linea.split(" ");
	int digitos=vals[0].length();
	long a,b;
	a=Long.parseLong(vals[0]);
	b=Long.parseLong(vals[1]);
	long reciclados=0;
	
	int indi,ind = (int)(b-a+1);
	
	int parejas[][]=new int[ind][ind];
	long t=b-a+1;
	long cal;
	long v,resto,pot;
	String resu,resu2;
/*	for (long =0;l<t;l++) { 
		r[(int)l]=0;
		r[(int)l]=0;
	}*/
	for (long l=a;l<=b;l++)
        {
            ind=(int) (l-a);
   
               for (int k=1;k<digitos;k++)
               {		  
                  pot=(long) Math.pow(10,k);  		       
		  resto=l%pot;
		  v=l/pot;
		  resu=""+resto+v;     
		  cal=Long.parseLong(resu);      
   		  indi=(int) (l-a);
                  ind=(int) (cal-a);		       
	          if (cal>=a && cal<=b && cal!=l && parejas[indi][ind]==0  && parejas[ind][indi]==0 )
                  {
	   //         System.out.println(""+l+" "+cal);
		    parejas[indi][ind]=1;
              	    reciclados++;    		      
	         }
		  
            }	      
	}
	return reciclados;
}

	public static void main(String args[])
  {
  try{

  FileInputStream fstream = new FileInputStream(args[0]);
  
  DataInputStream in = new DataInputStream(fstream);
  BufferedReader br = new BufferedReader(new InputStreamReader(in));
  String strLine;
  strLine = br.readLine();
  int casos=Integer.parseInt(strLine);
  int caso=1; 	  
  long respuesta=0;	
  while ((strLine = br.readLine()) != null)   {
              respuesta=procesar(strLine);
	      System.out.println("Case #"+caso+": "+respuesta);
              caso++;
	  }
  //Close the input stream
  in.close();
    }catch (IOException e){//Catch exception if any
  System.err.println("Error: " + e.getMessage());
  }
  }
}