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

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

package small;

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;
import java.util.List;

public class RecycledNumbers {

	private static int noOfCases;
	private static String[] result;
	private static List<Integer> listOfNumbers;
	private static String inputFile = "C-small-attempt0.in";
	private static String outputFile = "C-small-attempt0.out";
	
	public static void main(String[] args) {
		
		readInputFile();
		
		
		writeToFile(result);
	}
	
	public static void writeToFile(String args[]) {
		try {
			FileWriter fstream = new FileWriter(outputFile);
			BufferedWriter out = new BufferedWriter(fstream);
			for (int i = 0; i < args.length; i++) {
				out.write(args[i]);
				if (i != args.length - 1)
					out.newLine();
			}
			out.close();
		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}
	}

	private static void readInputFile() {

		try {
			FileInputStream fstream = new FileInputStream(inputFile);
			DataInputStream in = new DataInputStream(fstream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));

			noOfCases = Integer.parseInt(br.readLine());
			String strLine;
			result = new String[noOfCases];
			for (int i = 0; i < noOfCases; i++) {
				listOfNumbers = new ArrayList<Integer>();
				
				strLine = br.readLine();
				String[] temp = strLine.split(" ");
				int start = Integer.parseInt(temp[0]);
				int end = Integer.parseInt(temp[1]);
				System.out.println("start: "+start+".. end: "+end);
				
				int totalSum = getResult(start,end);
				System.out.println("Case #" + (i + 1) + ": " + totalSum);
				result[i] = "Case #" + (i + 1) + ": " + totalSum;
			}

			for(int x=0;x<listOfNumbers.size();x++){
				System.out.println(listOfNumbers.get(x));
			}
			in.close();
		} catch (Exception e) {
			e.printStackTrace();
			System.err.println("Error: " + e.getMessage());
		}
	}

	private static int getResult(int start, int end) {
		int totalSum = 0;
		for(int i=start;i<=end;i++){
			if(listOfNumbers.contains(i)){
				continue;
			}
			String number = String.valueOf(i);
			char[] numberArray = number.toCharArray();
			if(sameDigit(numberArray)){
				continue;
			}
			//System.out.println(number);
			totalSum = totalSum + getCount (numberArray,i,start,end);
		}
		//System.out.println(totalSum);
		return totalSum;
	}

	private static boolean sameDigit(char[] numberArray) {
		
		if(numberArray.length <=1){
			return true;
		}
		for(int i=0;i<numberArray.length-1;i++){
			if(numberArray[i] != numberArray[i+1]){
				return false;
			}
		}
		return true;
	}

	private static int getCount(char[] arr, int currentNumber,int start, int end) {
		int count=0;
		int nc2Count=0;
		char[][] tempNumbers = new char[arr.length][arr.length];
		int[] numberArray = new int[arr.length];
		List<Integer> localList  = new ArrayList<Integer>();
		//System.out.println("current number: "+currentNumber);
		
		// Getting different combination of char arrays//
		// Duplicate the first array
		for(int i=0;i<arr.length;i++){
			for(int j=0;j<arr.length;j++){
				tempNumbers[i][j] = arr[j];
			}
		}
		
		// Rest of the combinations
		for(int i=1;i<arr.length;i++){
			char a = tempNumbers[i-1][0];
			int j = 0;
			for(j=0;j<arr.length-1;j++){
				tempNumbers[i][j] = tempNumbers[i-1][j+1];
				//System.out.println("temp["+i+"]["+j+"] = "+tempNumbers[i-1][j+1]);
			}
			tempNumbers[i][j] = a;
		}
		// End of combinations//
		
		//Converting the char array of diff combinations to String and then to Integer
		// Also add the number to the count of valid combinations
		for(int i=0;i<arr.length;i++){
			String num = String.valueOf(tempNumbers[i]);
			numberArray[i] = Integer.parseInt(num);
			System.out.println(numberArray[i]);
			if((numberArray[i]>=start && numberArray[i]<=end) && (!localList.contains(numberArray[i]))){
				localList.add(numberArray[i]);
				count++;
				listOfNumbers.add(numberArray[i]);
			}
		}
		
		
		//Calculate the nc2 for the numbers
		nc2Count = (count * (count-1))/2;
		if(nc2Count!=0){
			System.out.println("current number: "+currentNumber+". count: "+count+". nc2 count: "+nc2Count);
		}
		System.out.println();
		return nc2Count;
	}
}
