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.FileReader;
import java.io.FileWriter;

public abstract class FileWrapper {

	protected static final String CASE = "Case #";
	protected static final String OUTPUT = "result.out";
	protected int caseNum = 0;
	protected String output[] = null;
	private FileReader fr = null;
	private BufferedReader br = null;
	private FileWriter fw = null;
	private BufferedWriter bw = null;

	protected void openReadFile(String fileName) throws Exception {
		this.fr = new FileReader(fileName);
		this.br = new BufferedReader(this.fr);
	}

	protected void closeReadFile() throws Exception {
		this.br.close();
		this.fr.close();
	}

	protected String readLine() throws Exception {
		return this.br.readLine();
	}
	
	protected boolean isFileReady() throws Exception {
		return this.br.ready();
	}
	
	protected abstract void processInput(String fileName);
	
	private void openWriteFile(String fileName) throws Exception {
		this.fw = new FileWriter(fileName);
		this.bw = new BufferedWriter(this.fw);
	}

	private void closeWriteFile() throws Exception {
		this.bw.close();
		this.fw.close();
	}

	private void writeLine(String line) throws Exception {
		this.bw.write(line);
		this.bw.newLine();
	}
	
	protected void processOutput(String fileName) {
		try{
			this.openWriteFile(fileName);
			for (int i=0; i<this.caseNum; i++) {
				this.writeLine(this.output[i]);
			}
			this.closeWriteFile();
		}catch(Exception e){}
	}
	
	protected abstract void calculate();

}