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.FileReader;
import java.io.IOException;
import java.util.HashSet;


public class RecycledNumbers {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws NumberFormatException, IOException {
		// open file and create a buffered reader
		FileReader input = new FileReader(args[0]);
		BufferedReader buffer = new BufferedReader(input);
		
		//read the number of testcases
		int max = Integer.parseInt(buffer.readLine().trim());
		
		// read a line and call the solving procedure for a single test case.  We expect back the result as a string
		for (int i = 1; i <= max; i++) {
			System.out.println("Case #"+i+": " + solve(buffer.readLine()));
		}

	}
	
	private static long solve(String input) {
		String[] split = input.split(" ");
		int A = Integer.parseInt(split[0]);
		int B = Integer.parseInt(split[1]);
		long count = 0;
		if (A < 10)
		{
			return 0;
		}
		for(int i = A; i < B; i++)
		{
			String str = Integer.toString(i);
			HashSet<Integer> all = new HashSet<Integer>();
			for(int j = 1; j < str.length(); j++)
			{
				String cycle = str.substring(j)+str.substring(0, j);
				int value = Integer.parseInt(cycle);
				if (value > i && value <= B && !all.contains(value))
				{
					all.add(value);
					count++;
				}
			}
		}
		return count;
	}
	
}
