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.googlerese.core;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import com.googlerese.file.FileRead;
import com.googlerese.file.FileWrite;

public class NumberRecycler {

    private static final String inputFileName = "C:/Documents and Settings/garan14/Desktop/input.txt";

    private static final String outputFileName = "C:/Documents and Settings/garan14/Desktop/out.txt";

    private static int divider = 1;


    public static void main( String[] args ) {
        NumberRecycler convertor = new NumberRecycler();
        Map<Integer, String[]> input = FileRead.getInstance().read( inputFileName );
        int testCases = input.size();
        Map<Integer, String> output = new HashMap<Integer, String>( testCases );

        for ( int i = 1; i <= testCases; i++ ) {
            String[] arr = input.get( i );
            String outputStr = convertor.convert( Integer.parseInt( arr[0] ), Integer.parseInt( arr[1] ) );
            System.out.println( "Output : " + outputStr );
            output.put( i, outputStr );
        }
        FileWrite.getInstance().write( outputFileName, output );
    }

    private String convert( final int start, final int end ) {
        int count = 0;
        for ( int i = start; i <= end; i++ ) {
            if ( i > 0 && i < 10 ) {
                divider = 1;
            } else if ( i > 9 && i < 100 ) {
                divider = 10;
            } else if ( i > 99 && i < 1000 ) {
                divider = 100;
            } else if ( i > 999 & i < 10000 ) {
                divider = 1000;
            } else if ( i > 9999 & i < 100000 ) {
                divider = 10000;
            } else if ( i > 99999 & i < 1000000 ) {
                divider = 100000;
            }
            int num = i;
            do {
                int rem = num % 10;
                num = num / 10;
                num = rem * divider + num;
                if ( num > i && num <= end ) {
                    count++;
                }
            } while ( i != num );
        }
        return "" + count;
    }
}
