import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.StringTokenizer;


public class Problem3 {
	public static void main(String[] args) throws Exception {
		  BufferedReader br = new BufferedReader(new FileReader(new File("C-small-attempt0.in")));
		  PrintWriter pw = new PrintWriter(new File("C-small-attempt0.out"));
		  int a,b ,count, m, digitscount;
		  int t= new Integer(br.readLine());
		  for(int c=1; c<=t; c++)
		  {
		   pw.append("Case #"+c+": ");
		   StringTokenizer st = new StringTokenizer(br.readLine());
		   a = new Integer(st.nextToken());
		   b= new Integer(st.nextToken());
		   
		   count=0; 
		   for (int n =a; n<b ; n++)
		   {
			   digitscount =1;
			   for(int i=n; i>0 ; i/=10)
				   digitscount*=10;
			   
			   HashSet<Integer> set = new HashSet<Integer>();
			   for(int i=10; i< n; i*=10)
			   {
				   m = n/i+ n%i*(digitscount)/i;
				   
				   //System.out.println(m);
				   if(m>n && m<=b && !set.contains(m))
				   {
					   set.add(m);
					   count++;
					  // System.out.println(n+" "+m);
				   }
			   }
			   
		   }
		   
		   pw.append(count+"");
		   pw.append('\n');
		  }
		  pw.flush();
		  pw.close();
		  br.close();
		 }
}
