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.util.HashSet;


public class Recycler implements Runnable{
	
	private int start,end;
	private HashSet<String> set;
	
	public Recycler(int first,int second){
		start=first;
		end=second;
		set=new HashSet<String>();
	}
	
	public void run(){
		for(int i=start;i<=end;i++){
			recycle(i);
		}
	}
	
	private void recycle(int num){
		String temp=String.valueOf(num);
		int length=temp.length();
		for(int i=length-1;i>0;i--){
			String temp2=temp.substring(i)+temp.substring(0,i);
			int num2=Integer.parseInt(temp2);
			if(num<num2 && num2<=end){
				set.add(num+""+num2);
				//System.out.println(temp+" "+temp2+" "+set.size());
			}
			//System.out.println(temp+" "+temp2+" "+set.size());
			
		}
	}
	public int getCount() {
		return set.size();
	}
}
