import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;

public class ReadFile {
	public static void main(String[] args) throws Exception {
		String srcFile = "C:" + File.separator + "Documents and Settings"
				+ File.separator + "rohit" + File.separator + "My Documents"
				+ File.separator + "Downloads" + File.separator
				+ "C-small-attempt1.in.txt";
		String destFile = "C:" + File.separator + "Documents and Settings"
				+ File.separator + "rohit" + File.separator + "My Documents"
				+ File.separator + "Downloads" + File.separator
				+ "C-small-attempt0.out";
		File file = new File(srcFile);
		List<String> readData = new ArrayList<String>();
		FileReader fileInputStream = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(fileInputStream);
		StringBuilder stringBuilder = new StringBuilder();
		String line = null;
		while ((line = bufferedReader.readLine()) != null) {
			readData.add(line);
		}
		stringBuilder.append(generateOutput(readData));
		File writeFile = new File(destFile);
		if (!writeFile.exists()) {
			writeFile.createNewFile();
		}
		FileWriter fileWriter = new FileWriter(writeFile);
		BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
		bufferedWriter.write(stringBuilder.toString());
		bufferedWriter.close();
		System.out.println("output" + stringBuilder);
	}

	/**
	 * @param number
	 * @return
	 */
	private static String generateOutput(List<String> number) {
		StringBuilder stringBuilder = new StringBuilder();
		for (int i = 0; i < number.size(); i++) {
			if (i == 0) {
				continue;
			} else {
				String tempString = number.get(i);
				String[] temArr = tempString.split(" ");
				stringBuilder.append("Case #" + i + ": ");
				stringBuilder.append(getRecNumbers(temArr[0], temArr[1]));
				stringBuilder.append("\n");
			}
		}
		if (stringBuilder.length() > 0) {
			stringBuilder.deleteCharAt(stringBuilder.length() - 1);
		}
		return stringBuilder.toString();
	}

	// /* This method accepts method for google code jam */
	// private static String method(String value) {
	// int intValue = Integer.valueOf(value);
	// double givenExpr = 3 + Math.sqrt(5);
	// double num = Math.pow(givenExpr, intValue);
	// String valArr[] = (num + "").split("\\.");
	// int finalVal = Integer.valueOf(valArr[0]) % 1000;
	//
	// return String.format("%1$03d", finalVal);
	//
	// }
	//
	// /* This method accepts method for google code jam */
	// private static String method2(String value) {
	// StringTokenizer st = new StringTokenizer(value, " ");
	// String test[] = value.split(" ");
	// StringBuffer str = new StringBuffer();
	//
	// for (int i = 0; i < test.length; i++) {
	// // test[i]=test[test.length-i-1];
	// str.append(test[test.length - i - 1]);
	// str.append(" ");
	// }
	// str.deleteCharAt(str.length() - 1);
	// String strReversedLine = "";
	//
	// while (st.hasMoreTokens()) {
	// strReversedLine = st.nextToken() + " " + strReversedLine;
	// }
	//
	// return str.toString();
	// }

	private static int getRecNumbers(String no1, String no2) {

		int a = Integer.valueOf(no1);
		int b = Integer.valueOf(no2);
		Set<String> dupC = new HashSet<String>();
		for (int i = a; i <= b; i++) {
			int n = i;
			List<String> value = findPerm(n);
			for (String val : value) {
				if (Integer.valueOf(val) <= b && Integer.valueOf(val) >= a
						&& n < Integer.valueOf(val)) {
					dupC.add(n + "-" + val);
				}
			}
		}
		return dupC.size();
	}

	private static List<String> findPerm(int num) {
		String numString = String.valueOf(num);
		List<String> value = new ArrayList<String>();
		for (int i = 0; i < numString.length(); i++) {
			String temp = charIns(numString, i);
			if (!temp.equalsIgnoreCase(numString)) {
				value.add(charIns(numString, i));
			}
		}
		return value;

	}

	public static String charIns(String str, int j) {
		String begin = str.substring(0, j);
		String end = str.substring(j);
		return end + begin;
	}
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   GoogleCodeJam 2012
   Qualifier
   Problem 3 - Only for SMALL Input
   
   1.0
   by José Alberto Bonilla Vera (2012)
   Mexico
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	Package name
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	Java library imports
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/

import java.lang.*;
import java.lang.reflect.*;
import java.math.*;
import java.util.*;
import java.io.*;
import java.text.*;

//import com.rits.cloning.*;
//import org.objenesis.*;

//import helper.Helper;
//import helper.AuxMath;


/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	Main Class
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/

public class QualifierProblem3 {
	
	private static BufferedReader br;
	private static BufferedWriter bw;

	public static void solveProblem(String[] args) {
		/*======== Persistent Variable declarations ========*/
		String thisLine = "";
		int numCases = 0;
		String result = "";
		String[] splitLine;
		
		/*======== Problem-specific Variable declarations ========*/
		int numPairs = 0;
		int a_num = 0;
		int b_num = 0;
		int n1 = 0;
		int n2 = 0;
		int num_digits = 0;
		
		/*======== Logic ========*/
		try {
		
			/*======== Read Number of Cases ========*/
			numCases = Integer.parseInt(br.readLine());

			/*======== Process each case ========*/
			for (int i=1; i<=numCases; i++) {
			
				
				/*======== Read Each Case ========*/
				
				thisLine = br.readLine();
				splitLine = thisLine.split(" ");
				System.out.println ("___NUEVO CASO___");
				a_num = Integer.parseInt(splitLine[0]);
				b_num = Integer.parseInt(splitLine[1]);
				num_digits = (""+a_num).length();
				numPairs = 0;
				
				if (num_digits == 1 || num_digits == 4) {
					numPairs = 0;
				}				
				else {
					for (int j=a_num; j<=b_num; j++) {
						if (num_digits == 2) {
							n1 = Integer.parseInt( (""+j).substring(0,1)+(""+j).substring(1,2) );
							n2 = Integer.parseInt( (""+j).substring(1,2)+(""+j).substring(0,1) );
							//System.out.print("Comparando ("+n1+","+n2+")");
							if (a_num <= n1 && n1 < n2 && n2 <= b_num) {
								numPairs = numPairs + 1;
								//System.out.println(" (*)");
							}
						}
						else {
							n1 = Integer.parseInt( (""+j).substring(0,1)+(""+j).substring(1,2)+(""+j).substring(2,3) );
							n2 = Integer.parseInt( (""+j).substring(1,2)+(""+j).substring(2,3)+(""+j).substring(0,1) );
							//System.out.print("a) Comparando ("+n1+","+n2+")");
							if (a_num <= n1 && n1 < n2 && n2 <= b_num) {
								numPairs = numPairs + 1;
								//System.out.println(" (*)");
							}
							//System.out.println();
							n1 = Integer.parseInt( (""+j).substring(0,1)+(""+j).substring(1,2)+(""+j).substring(2,3) );
							n2 = Integer.parseInt( (""+j).substring(2,3)+(""+j).substring(0,1)+(""+j).substring(1,2) );
							//System.out.print("b) Comparando ("+n1+","+n2+")");
							if (a_num <= n1 && n1 < n2 && n2 <= b_num) {
								numPairs = numPairs + 1;
								//System.out.println(" (*)");
							}
						}
					}
				}
				
				result = ""+numPairs;
				System.out.println("Resultado: "+result);
				
				/*======== Write the result of the case to file ========*/
				bw.write("Case #" + i + ": " + result + "\r\n");
			}
		}
		catch (Exception e) {
			e.printStackTrace();			
		}
	}

	public static void main(String[] args) {
		try {
			/*======== Open Input File ========*/
			br = new BufferedReader(new FileReader(args[0]));
			/*======== Open Output File ========*/
			bw = new BufferedWriter(new FileWriter(args[1]));
			/*======== Solve Problem ========*/
			solveProblem(args);
			
			/*======== Close Output File ========*/
			bw.close();
			/*======== Open Input File ========*/
			br.close();
		}
		catch (IOException ioe) {
			System.out.println(ioe);
		}
	}	
}