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.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author Hossam Yasseen
 */
public class ProblemC {

	/**
	 * @param args
	 */
	static Integer startEdge , endEdge ;
	
	public static void main(String[] args) {
		
		int numberOfRecycledNumbers = 0;

		String[] result = null ;
		for (int counter0 = 1; counter0 < args.length; counter0++) {
			result = args[counter0].split("\\s");
			startEdge = Integer.parseInt(result[0]);
			endEdge = Integer.parseInt(result[1]);
			numberOfRecycledNumbers=0 ;
			
			for (int counterA = startEdge; counterA < endEdge; counterA++) {
				List<Integer> recycledNumber = recycledNumbers(counterA);
				for (int counter = 0; counter < recycledNumber.size(); counter++) {
					if (recycledNumber.get(counter) <= endEdge )
						numberOfRecycledNumbers++;
				}
			}
			System.out.println("Case #" + counter0 + ": "
					+ numberOfRecycledNumbers);
		}
	}

	private static List<Integer> recycledNumbers(Integer number) {

		Map<Integer,String> map = new HashMap<Integer, String>();
		String dummyValue = null ;
		String candidateNumber = "";

		char[] characters = number.toString().toCharArray();

		int index;
		for (int counter = 0; counter < characters.length; counter++) {
			index = counter ;
			int loops = 0 ;
			candidateNumber="";
			
			for ( ; loops < characters.length; index++) {
				candidateNumber += characters[index % characters.length];
				loops++ ;
			}
			
			if(Integer.parseInt(candidateNumber)>number.intValue())
				map.put(Integer.parseInt(candidateNumber),dummyValue);
			
		}
		
		List<Integer> recycledNumber =  new ArrayList<Integer>( map.keySet());
		return recycledNumber;
	}
}
