package codejam;

import java.util.*;
import java.io.*;

public class RecycledNumbers {
	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new FileReader("in.txt"));
		PrintWriter out = new PrintWriter(new File("out.txt"));
		
		int T = Integer.parseInt(in.readLine());
		for (int t = 1; t <= T; ++t) {
			String[] parts = in.readLine().split("[ ]+");
			int A = Integer.parseInt(parts[0]);
			int B = Integer.parseInt(parts[1]);
			
			int cnt = 0;
			for (int i = A; i < B; ++i) {
				String str = String.valueOf(i);
				int n = str.length();
				String res = "";
				Set<Integer> seen = new HashSet<Integer>();
				for (int j = n - 1; j > 0; --j) {
					res = str.substring(j) + str.substring(0, j);
					int k = Integer.parseInt(res);
					if (k > i && k <= B) {
						//System.out.println("(" + i + ", " + k + ")");
						if (!seen.contains(k)) {
							++cnt;
							seen.add(k);
						}
					}
				}
			}

			out.println("Case #" + t + ": " + cnt);
		}
		
		in.close();
		out.close();
		System.exit(0);
	}
}

import java.util.*;

public class RCTest{

	public static void main(String[] args){
	
		Scanner scan = new Scanner(System.in);
		int numberOfCases = Integer.parseInt(scan.nextLine());
		for(int i = 1; i <= numberOfCases; ++i){
			String line = scan.nextLine();
			String[] inputs = line.split(" ");
			int lower = Integer.parseInt(inputs[0]);
			int upper = Integer.parseInt(inputs[1]);
			RCTest r = new RCTest();
			System.out.println("Case #" + i + ": " + r.getRecycleNumbers(lower, upper));
		}
	}
	
	public int getRecycleNumbers(int a, int b){
		this.lower = a;
		this.upper = b;
		int counter = 0;
		for(int i = a; i<=b; ++i){
			int originalNumber = i;
			int index = getIndex(originalNumber);
			int recycledNumber = getRecycledNumber(i,index);
			
			while(originalNumber!=recycledNumber){
			
				if(originalNumber < recycledNumber && recycledNumber <= upper)++counter;
				recycledNumber = getRecycledNumber(recycledNumber,index);
			}
			
		}
		return counter;
	}
	public int getRecycledNumber(int number, int index){
		int remainder = number % 10;
		int quotient = number/10;
		int recycledNumber = ((int)Math.pow(10,index) * remainder) +  quotient;
		return recycledNumber;
	}	
	
	private int getIndex(int number){
		int index = 0;
		while(number!=0){
			number/=10;
			++index;
		}
		return index-1;
	}
	private int lower;
	private int upper;
}