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 com.google.codejam.recycle;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

/**
 *
 * Class to generate Test Report.
 * @author Sushant Deshpande
 */
public class OutputRecorder {

    /**
     * Method for generating Test Report.
     * @param testCases List<TestCase> list of test cases for report is to be generated.
     * @param outputFile String output file for writing TestReport.
     */
    public static void generateTestReport(final List<TestCase> testCases, final  String outputFile) {
        BufferedWriter writer = null;
        try {
            writer = new BufferedWriter(new PrintWriter(outputFile));
            for(TestCase testCase : testCases) {
                writer.write(testCase.printTestResult());
                writer.flush();
            }
            writer.flush();
        } catch(IOException ie) {
            System.out.println("Some error occured while generating test report " + ie.getMessage());
            System.out.println("Printing result to standard output");
            for(TestCase testCase : testCases) {
                System.out.println(testCase.printTestResult());
            }
        } finally {
            if(writer != null) {
                try {
                    writer.close();
                } catch(IOException ie) {
                    System.out.println("Some error occured while closing output stream");
                }
            }
        }
    }

}