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.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;


public class recycle {
	static int count=0;
	static int A = 0;
	static int B = 0;
	
	public static void permutes(String start){
		int n = Integer.valueOf(start);
		for(int i=1;i<start.length();i++){
			String current = start.substring(0, i);
			String rest = start.substring(i, start.length());
			String finish = rest+current;
			int m = Integer.valueOf(finish);
			if(n==m){
				break;
			}
				
			if(m<=B && n<m){
				count++;
			
			}
		}
		
	}
	public static void main(String args[])
	 {
		String line;
		  int i=0;
		  try{
		  FileInputStream fstream1 = new FileInputStream("Ctest.txt");
		  DataInputStream in1 = new DataInputStream(fstream1);
		  BufferedReader br1 = new BufferedReader(new InputStreamReader(in1));
		  FileWriter fw = new FileWriter("outC.txt");
		  BufferedWriter out = new BufferedWriter(fw);
		 
		  while ((line = br1.readLine()) != null)   {  
		  		

		  		if(i!=0){
		  			String outpt = "Case #"+i+": ";
		  			String brkline[]=line.split(" ");
		  			A = Integer.valueOf(brkline[0]);
		  			//System.out.println("A= "+A);
		  			B = Integer.valueOf(brkline[1]);
		  			//System.out.println("B= "+B);
		  			
		  			for(int p=A;p<=B;p++){
		  				permutes(String.valueOf(p));
		  			}
		  			outpt = outpt+count;		
		  			out.write(outpt+"\n");
		  			System.out.println(outpt);
		  			}
		  		
		  		i++;
		  		count=0;
		  	  }
		  
		  //Close the input stream
		  in1.close();
		  //Close the output stream
		  out.close();
		    }catch (Exception e){//Catch exception if any
		  System.err.println("Error: " + e);
		  }
/////////////////////////////////////////////////				
		
	 }
}
