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.File;
import java.io.FileNotFoundException;
import java.io.FileReader;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;

/** Main function is "solve" **/
public class CodeJamProblem3 {
	static HashMap<String, String> mappings = null;

	public static void main(String args[]) {
		solve();
	}

	private static void solve() {
		readFromInputAndWriteInOutput();
	}

	private static void readFromInputAndWriteInOutput() {
		try {
			File f = new File("D:\\code_html\\C-large.in");
			FileReader fileReader = new FileReader(f);
			BufferedReader buff = new BufferedReader(fileReader);
			String totalTestCases = buff.readLine();
			PrintWriter printWriter = new PrintWriter(
					"D:\\code_html\\C-large.out");
			int testCases = Integer.parseInt(totalTestCases);
			for (int i = 1; i <= testCases; i++) {

				String line = buff.readLine();
				String outputLine = "Case #" + i + ": ";
				String result = solveForThisLine(line);
				outputLine = outputLine.concat(result);
				printWriter.println(outputLine);
				//System.out.println(outputLine);
			}
			printWriter.close();
			fileReader.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}
	private static String solveForThisLine(String line) {

		String lineSplit[] = line.split(" ");
		int numA = Integer.parseInt(lineSplit[0]);
		int numB = Integer.parseInt(lineSplit[1]);
		int result = 0;
		int length = lineSplit[0].length();
		int tensLength = 1;	
	//	System.out.println();
		for(int i=0;i<length-1;i++)
		{
			tensLength=tensLength*10;
		}
		for (int i = numA; i <= numB; i++) {
			int n = i;
			ArrayList<Integer > list2 = new ArrayList<Integer>();
			for (int j = 0; j <=length; j++) {
				
				int m = reverse(i, j,tensLength);
				if (numA <= n && n < m && m <= numB) {
						if(list2.contains(m))
						{
						   continue;
						}
					list2.add(m);
					result = result + 1;
				}
				
			}
		}
		return result + "";
	}

	private static int reverse(int number, int shiftBy, int tensLength) {
		int temp = 0, reversedNumber = 0;
		for (int i = 0; i <shiftBy; i++) {		
			temp = number % 10;
			number = number / 10;
			reversedNumber = temp *tensLength  + number;
			number= reversedNumber;
		}
		return reversedNumber;
	}

}
