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.FileWriter;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class Third {

	public static void main(String[] args) {

		try {
			BufferedReader reader = new BufferedReader(new FileReader(new File("input.txt")));
			PrintWriter writer = new PrintWriter(new FileWriter(new File("output.txt")));
			reader.readLine();
			int test = 1;
			String str = "";
			while((str = reader.readLine()) != null){
				long result = 0;
				String[] temp = str.split(" ");
				int a = Integer.parseInt(temp[0]);
				int b = Integer.parseInt(temp[1]);
				boolean[] visited = new boolean[b + 1];
				
				for(int num = a; num <= b; num++){
					if(visited[num]) continue;
					
					int[] digits = GetDigit(num);

					Set<Integer> recycledNum = new HashSet<Integer>();
					for(int i = 0; i < digits.length; i++){
						int thisNum = GetNum(digits, i);
						int thisNumDigit = (int) (Math.log10(thisNum) + 1);
						if(thisNum >= a && thisNum <= b && thisNumDigit == digits.length)
							recycledNum.add(thisNum);
					}
					if(recycledNum.size() > 1){
						result += recycledNum.size() * (recycledNum.size() - 1) / 2;
						Iterator<Integer> iterator = recycledNum.iterator();
						while(iterator.hasNext()){
							visited[iterator.next()] = true;
						}
					}
				}
				writer.println("Case #" + test + ": " + result);
				test++;
			}
			writer.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	private static int[] GetDigit(long num){
		int digits = (int) (Math.log10(num) + 1);
		int[] result = new int[digits];
		while(digits > 0){
			result[--digits] = (int) (num % 10);
			num /= 10;
		}
		return result;
	}
	
	private static int GetNum(int[] digits, int startDigit){
		int number = 0;
		int pos = startDigit;
		do{
			number = number * 10 + digits[pos];
			pos++;
			if(pos >= digits.length) pos -= digits.length;
		} while(startDigit != pos);
		return number;
	}
}
