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.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;



public class RecycledNumbers {

	private final String inputFile = "D:\\input.in";
	private final String outputFile = "D:\\output.out";
	private static  class TestCase{
		int a;
		int b;
		public int calculateRecycleds(){
			int result = 0;
			for (int i = a; i <= b; i++){
				int numDigits = getNumDigits(i);
				int lastResycled = -1;
				for (int j = 0, divisor = 10; j < numDigits - 1; j++, divisor *= 10){
					int recycled = i % divisor;
					for (int k = 0; k < numDigits - j - 1; k++){
						recycled *= 10;
					}
					recycled += (i / divisor);
					if (isInRange(recycled) && recycled > i && lastResycled != recycled){
						result ++;
						lastResycled = recycled;
					}
				}
				
			}
			return result;
		}
		private int getNumDigits(int i){
			int numDigits = 0;
			while (i > 0){
				numDigits++;
				i /= 10;
			}
			return numDigits;
		}
		private boolean isInRange(int i){
			return (i >= a) && (i <= b);
		}
	}
	List<TestCase> input =  new ArrayList<RecycledNumbers.TestCase>();
	public void parseInput(){
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(inputFile)));
			int numTestCases = Integer.parseInt(br.readLine());
			for (int i = 0; i < numTestCases; i++){
				String [] lineTokens = br.readLine().split(" ");
				TestCase tc = new TestCase();
				tc.a = Integer.parseInt(lineTokens[0]);
				tc.b = Integer.parseInt(lineTokens[1]);
				input.add(tc);
			}			
			br.close();
			} catch (Exception e) {
				e.printStackTrace();
			}
	}
	public void doOutput(){
		try {
			PrintWriter pw = new  PrintWriter(new FileOutputStream(outputFile));
			
			for (int i = 0; i < input.size(); i++){
				TestCase tc = input.get(i);
				pw.println("Case #" + (i + 1) + ": " + tc.calculateRecycleds());
			}
			pw.flush();
			pw.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
	}
	
	public static void main(String [] args){
		RecycledNumbers rn  = new RecycledNumbers();
		rn.parseInput();
		rn.doOutput();
	}
}
