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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class C {

	public static long convert(String input) {
		long output = 0;
		String[] pairs = input.split(" ");
		String first = pairs[0];
		String second = pairs[1];
		if (first.length() != 1) {
			long firstInt = Long.parseLong(first);
			long secondInt = Long.parseLong(second);
			for (long k = firstInt; k < secondInt; k++) {
				String firstNum = k + "";
				if (!same(firstNum)) {
					int len = firstNum.length();
					for (int i = 0; i < len - 1; i++) {
						char lastChar = firstNum.charAt(len - 1);
						String newFirstNum = lastChar
								+ firstNum.substring(0, len - 1);
//						 System.out.println(firstNum + "---" +
//								 newFirstNum);
//						list2.add(newFirstNum);
						long secondNum = Long.parseLong(newFirstNum);
						if ((secondNum + "").length() == firstNum.length()) {
							if (secondNum <= secondInt && secondNum > k
									) {
								output++;
//								 System.out.println(k + "---" +
//										 secondNum);
							}
						}
						firstNum = newFirstNum;
					}
				}
			}
		}

		return output;
	}


	private static boolean same(String s) {
		for (int i = 0; i < s.length() - 1; i++) {
			if (s.charAt(i) != s.charAt(i + 1))
				return false;
		}
		return true;
	}

	public static void main(String[] args) {
		String inputFile = "C-large.in";
		String outPutFile = "C-large.out";
		try {
			FileInputStream fstream = new FileInputStream(inputFile);
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			FileWriter fstream2 = new FileWriter(outPutFile);
			BufferedWriter out = new BufferedWriter(fstream2);
			String strLine;
			strLine = br.readLine();
			int casesNum = Integer.parseInt(strLine);
			for (int i = 0; i < casesNum; i++) {
				strLine = br.readLine();
				String parse = "Case #" + (i + 1) + ": " + convert(strLine);
				System.out.println(parse);
				if (i < casesNum - 1)
					parse += "\n";
				out.write(parse);
			}
			in.close();
			out.close();
		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}

	}

}
