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.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;



public class RNumber extends Basic2
{

   public static void main(String[] args) throws Exception 
   {
      RNumber p3 = new RNumber();
      p3.initialize();
      p3.printOutput();
      p3.bos.close();
   }
   
   @Override
   public void printOutput() throws Exception
   {
      int noTC = Integer.parseInt(bis.readLine());
      int runningTC = 1;
      while(runningTC<=noTC)
      {
         String[] a_b_str =bis.readLine().split(" ");
         long[] a_b = new long[]{Long.parseLong(a_b_str[0]),Long.parseLong(a_b_str[1])};
         if(a_b[0]>a_b[1])
         {
            long temp = a_b[0];
            a_b[0] = a_b[1];
            a_b[1] = temp;
         }
         Set<Long> found = new HashSet<Long>();
         int leading =0;
         for(long i=a_b[0];i<=a_b[1];i++)
         {
            long numberToCheck = i;
            for(long k = numberToCheck+1;k<=a_b[1];k++)
            {
               if(((""+k).length()==(""+numberToCheck).length()) && (""+k+""+k).contains(""+numberToCheck))
               {
                     leading++;
               }
               /*int t= k;
               String n=""+numberToCheck;
               int ld = 0;
               while(t>10 && t%10==0 && t>a_b[0])
               {
                  t=t/10;
                  ld++;
               }
               String ldSt="";
               for(int hh=0;hh<ld;hh++)
               {
                     ldSt ="0"+ldSt;
                     if(Integer.parseInt(ldSt+t)!=Integer.parseInt(t+ldSt))
                     {
                        found.add(ldSt+t);
                        found.add(t+ldSt);
                     }
               }*/
            }
         }
         bos.println("Case #"+runningTC+": "+leading);
         runningTC++;
      }
   }
}

abstract class Basic2
{
   protected BufferedReader bis;
   
   protected PrintWriter bos;
   
   protected void initialize() throws Exception
   {
      FileReader fs = null;
      FileWriter fr = null;

      fs = new FileReader(
            "C:\\CJ\\input2.txt");
      bis = new BufferedReader(fs);

      fr = new FileWriter(
            "C:\\CJ\\output2.txt");
      bos = new PrintWriter(fr);

   }
   
   public abstract void printOutput() throws Exception;
}
