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.*;
   public class CodeJamQualC
   {
      public static void main(String[] args)
      {
         try{
            BufferedReader fin = new BufferedReader(new FileReader("input.txt"));
            FileWriter fstream = new FileWriter("output.txt");
            BufferedWriter out = new BufferedWriter(fstream); 
            Scanner src = new Scanner(fin);
            int j = 0;
            while (fin.ready()) {
               if( j > 1)
               {
                  out.write("\n");
               }
               String text = fin.readLine();
               Scanner scanner = new Scanner(text);
               int[] inputs = {0,0};
               int count = 0;
               while(scanner.hasNext())
               {
                  inputs[count] = scanner.nextInt();
                  count++;
               }
               if( j >0)
               {
               	
                  out.write("Case #" + j + ": " + numPairs(inputs[0],inputs[1]));
                  ;
               }
               j++;
            }
            out.close();
         }
            catch(FileNotFoundException e)
            {
               System.out.println("Error");
            }
            catch(IOException e)
            {
               System.out.println("Error");
            }
      
      }
   
   
      public static int numPairs(int input1, int input2)
      {
         int totalnum=0;
         int count = 0;
         
         if(input2 < input1)
            input2 = input1;
         ArrayList[] usedValues = new ArrayList[input2+1];
         for(int i = 0; i <= input2; i++)
         {
            usedValues[i] =  new ArrayList<Integer>();
         }
         int numDigits = (int)Math.floor(Math.log10((double)input1)+ 1);
         for(int i = input1; i <= input2; i++)
         {
         	
            int val = i;
            for(int j = 0; j < numDigits; j++)
            {
               int lastDigit = val % 10;
               val = val / 10;
               val += Math.pow(10,numDigits-1) * lastDigit;
               if(input1 <= val && input2 >= val && val != i && !usedValues[i].contains(val))
               {
                  usedValues[i].add(val);
                  usedValues[val].add(i);
                  count++;
               }
            } 
         }
         //System.out.println(totalnum);
         return count;
      }
   
   }