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.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;


public class C_RecycledNumbers {

	//static String inputFile = "C_Sample.in";	
	static String inputFile = "C-small-attempt1.in";	
	//static String inputFile = "C-large-attempt0.in";

	public static void main(String[] args) {		
		List<String> input = null;
		List<String> output = new ArrayList<String>();

		String outputFile = inputFile.split("\\.")[0]+".out";

		try {
			input = Files.readAllLines(Paths.get("Input\\"+inputFile), Charset.defaultCharset());
		} catch (IOException e) {
			e.printStackTrace();
		}

		int cases = Integer.parseInt(input.get(0));		
		
		long startTime = System.currentTimeMillis();

		for(int currentCase = 1;currentCase<cases+1;currentCase++) {
			String line = input.get(currentCase);
			String outputLine = "Case #" + currentCase + ": ";

			String[] splitted = line.split(" ");
			int A=Integer.parseInt(splitted[0]);
			int B=Integer.parseInt(splitted[1]);
			int result = 0;
			
			if((""+A).length()==(""+B).length()) {
				int min = Math.min(A, B);
				int max = Math.max(A, B);

				for(int m=min;m<=max;m++) {
					for(int n=m+1;n<=max;n++) {
						String m_string = ""+m;
						
						boolean isRecycled=false;
						
						for(int nbChars=1;nbChars<m_string.length();nbChars++) {
							String m_move = m_string.substring(0, nbChars);
							String m_keep = m_string.substring(nbChars, m_string.length());
							int attempt = Integer.parseInt(m_keep+m_move);
							if(n==attempt) {
								isRecycled=true;
								break;
							}
						}
						
						if(isRecycled) {
							result++;
						}
					}			
				}
			}
			
			outputLine +=result; 

			System.out.println(outputLine);			
			output.add(outputLine);	
		}
		
		long endTime = System.currentTimeMillis();
		long elapsedTime = endTime - startTime;
		System.out.println("Elapsed time: " + elapsedTime/1000F + "s");
		
		try {
			Files.write(Paths.get("Output\\"+outputFile), output, Charset.defaultCharset());
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}
