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.FileInputStream;
//import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

//import java.util.Scanner;

public class C {

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		BufferedReader read = new BufferedReader(new InputStreamReader(
				new FileInputStream(
						"C:/Users/Ortiga/Downloads/C-small-attempt0.in")));
		byte length = Byte.parseByte(read.readLine());

		BufferedWriter write = new BufferedWriter(new OutputStreamWriter(
				new FileOutputStream("C:/Users/Ortiga/Downloads/outputC.txt")));
		for (int i = 0; i < length; i++) {
			String[] line = read.readLine().split(" ");
			int a = Integer.parseInt(line[0]), b = Integer.parseInt(line[1]), pairs = 0;
			String rit = "Case #" + (i + 1) + ": ";
			for (int j = a; j <= b; j++) {
				String cur = j + "";
				for (int k = 1; k < line[0].length(); k++) {
					int a1 = Integer.parseInt(cur.substring(k)
							+ cur.substring(0, k));
					if (a1 > j && a1 <= b)
						pairs++;
				}
			}
			rit += pairs;
			write.write(rit);
			if (i < length - 1)
				write.newLine();
		}
		read.close();
		write.close();
	}
}