import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Recycled {
	public static void main(String[] args) throws Exception{
		String inputFile = "C-small-attempt0.in";
		
		BufferedReader input = new BufferedReader(new InputStreamReader(new FileInputStream(inputFile)));
		BufferedWriter output = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("output")));
		long num_cases = Long.parseLong(input.readLine());
		int current_case = 0;
		
		while (current_case < num_cases){
			current_case++;
			
			String[] fields = input.readLine().split(" ");
			int A = Integer.parseInt(fields[0]);
			int B = Integer.parseInt(fields[1]);
			int total = 0;
			
			for (int n = A; n < B; n++){
				for (int m = n+1; m <= B; m++){
					if (isRecycled(n,m)) total++;
				}
			}
			
			System.out.println("Case #" + current_case + ": " + total);
			output.write("Case #" + current_case + ": " + total + "\n");
		}
		output.close();
	}

	private static boolean isRecycled(int n, int m) {
		String sn = ""+n;
		String sm = ""+m;
		if (sn.length() != sm.length()) return false;
		int totaln = 0, totalm = 0;
		for (int i = 0; i < sn.length(); i++){
			totaln += sn.charAt(i);
			totalm += sm.charAt(i);
		}
		if (totaln != totalm) return false;
		for (int i = 0; i < sn.length()-1; i++){
			sm = sm.charAt(sm.length() - 1) + sm.substring(0, sm.length() - 1);
			if (sm.equals(sn)) return true;
		}
		return false;
	}
}

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

public class Solution {
	FastScanner in;
	PrintWriter out;

	int doFromStr(String s, int k) {
		int ans = 0;
		for (int i = k; i < s.length(); i++) {
			ans = ans * 10 + s.charAt(i) - '0';
		}
		for (int i = 0; i < k; i++) {
			ans = ans * 10 + s.charAt(i) - '0';
		}
		return ans;
	}
	
	public void solve() throws IOException {
		int cases = in.nextInt();
		for (int nowCase = 1; nowCase <= cases; nowCase++) {
			int a = in.nextInt();
			int b = in.nextInt();
			long ans = 0;
			for (int x = a; x < b; x++) {
				ArrayList <Integer> add = new ArrayList<Integer>();
				String s = (new Integer(x)).toString();
				for (int k = 1; k < s.length(); k++) {
					int newVal = doFromStr(s, k);
					boolean newV = true;
					if (newVal > x && newVal <= b) {
						for (int i = 0; i < add.size(); i++) {
							if (add.get(i) == newVal) newV = false;
						}
						if (newV) add.add(newVal);
					}
				}
				ans += add.size();
			}
			//
			out.print("Case #");
			out.print(nowCase);
			out.print(": ");
			//
			out.print(ans);
			//
			out.println();
		}
	}

	public void run() {
		try {
			in = new FastScanner(new File("c.in"));
			out = new PrintWriter(new File("c.out"));

			//in = new FastScanner(System.in);
			//out = new PrintWriter(System.out);

			solve();

			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	class FastScanner {
		BufferedReader br;
		StringTokenizer st;

		FastScanner(File f) {
			try {
				br = new BufferedReader(new FileReader(f));
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			}
		}

		FastScanner(InputStream f) {
			br = new BufferedReader(new InputStreamReader(f));
		}

		String next() {
			while (st == null || !st.hasMoreTokens()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}
		
		String readLine() {
			try {
				return br.readLine();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return " ";
		}

		int nextInt() {
			return Integer.parseInt(next());
		}
	}

	public static void main(String[] arg) {
		new Solution().run();
	}
}