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.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;

public class ProblemB {
	private static List<Integer> digits100(int i) {
		List<Integer> digits = new ArrayList<Integer>();
		while (i > 0) {
			digits.add(i % 10);
			i /= 10;
		}
		Collections.sort(digits);
		return digits;
	}

	private static List<Integer> firstDigits1000(int i) {
		List<Integer> digits = new ArrayList<Integer>();
		digits.add(i % 10);
		digits.add((i - (i % 10)) / 10);
		Collections.sort(digits);
		return digits;
	}

	private static List<Integer> secondDigits1000(int i) {
		List<Integer> digits = new ArrayList<Integer>();
		digits.add(i % 100);
		digits.add((i - (i % 100)) / 100);
		Collections.sort(digits);
		return digits;
	}

	public static void main(String[] args) throws NumberFormatException,
			IOException {

		BufferedReader br = new BufferedReader(new FileReader("C-small-attempt0.in"));
		PrintWriter out = new PrintWriter(new FileWriter("output.txt"));

		ArrayList<List<Integer>> digitsList = new ArrayList<List<Integer>>();
		LinkedHashSet<List<Integer>> digitsSet = new LinkedHashSet<List<Integer>>();

		int testCases = Integer.parseInt(br.readLine());
		for (int i = 1; i <= testCases; i++) {
			out.print("Case #"+i+": ");
			String[] str = br.readLine().split(" ");
			int int1 = Integer.parseInt(str[0]);
			int int2 = Integer.parseInt(str[1]);
			for (int j = int1; j <= int2; j++) {
				if (j < 100) {
					digitsList.add(digits100(j));
					digitsSet.add(digits100(j));
				} else if (j < 1000) {
					if (firstDigits1000(j).get(1) > 9) {
						digitsList.add(firstDigits1000(j));
						digitsSet.add(firstDigits1000(j));
					}
					if (!firstDigits1000(j).equals(secondDigits1000(j))
							&& secondDigits1000(j).get(1) > 9) {
						digitsList.add(secondDigits1000(j));
						digitsSet.add(secondDigits1000(j));
					}

				}
			}
			out.println(digitsList.size() - digitsSet.size());
			for (List<Integer> li : digitsSet) {
				digitsList.remove(digitsList.indexOf(li));
			}
			System.out.println(digitsList.toString());
			System.out.println(digitsList.size());
			// System.out.println(digitsSet.toString());
			// System.out.println(firstDigits1000(100));
			// System.out.println(secondDigits1000(100));
			digitsSet.clear();
			digitsList.clear();
		}

		out.close();
	}

}
