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.*;
import java.lang.*;
import java.math.*;
public class problem {
    public BufferedWriter outf;
    public BufferedWriter outft;
    DataInputStream bs;
   public problem(){
try{
            File in = new File("in.txt");
            outf = new BufferedWriter(new FileWriter("out.txt", true));
            outft = new BufferedWriter(new FileWriter("out1.txt", true));
            bs = new DataInputStream(new FileInputStream(in));

       }
catch(IOException e){}

   }
    void stack()
    {
        try{int ret=0;
            int a=new Integer(bs.readLine());
            for(int i=0;i<a;i++)
            {
                    String line=bs.readLine();

                    act(line);
                    int qw=i+1;
                    String s= Integer.toString(cnt);
                        outf.write("Case #"+qw+": "+s);
                    outf.newLine();
                    outf.flush();
            }





        }
        catch(IOException e){}
        return;
    }char[] comb,opp;int count = 1;char[] combine;
    int cnt;
    void act(String line)
    {
     cnt = 0;
     String[] nums = new String[2];
     nums = line.split(" ");
     String t = new String(nums[0]);
     int num_size = t.length();
     int lower = new Integer(nums[0]);
     int upper = new Integer(nums[1]);
     
     for(int i = lower,k = 0;i < upper;k++,i++)
     {
        int[] res = span(i,num_size);
        
        for(int j = 0;j<res.length;j++)
        {
          if(res[j]>i && res[j]<=upper && res[j]>=lower)
          {try{
              String S = "Case #"+Integer.toString(k)+"  "+Integer.toString(i)+": "+Integer.toString(res[j]);
              outft.write(S);
              outft.newLine();
              outft.flush();
              cnt++;}
           catch(IOException r)
                  {
               
           }
            }
        }
        }
 }

    int[] span(int num,int num_size)
    { 
         int[] res = new int[num_size];

        String rec = Integer.toString(num);
        char[] previous = new char[rec.length()];
        rec.getChars(0,rec.length(), previous, 0);

        res [0] = new Integer(rec); //store 1st
        for(int j = 1; j < num_size; j++)
        {
            char first = previous[0];
            for(int i = 0;i<num_size-1;i++)
            {
               previous[i] = previous[i+1];
            }
            previous[num_size-1] = first;
            String u = new String(previous);
            res[j] = new Integer(u);
        }
        return res;
    }
public static void main(String[] args) {
        problem m = new problem();
m.stack();
    }
}
