package jp.funnything.competition.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;

import org.apache.commons.io.IOUtils;

public class QuestionReader {
    private final BufferedReader _reader;

    public QuestionReader( final File input ) {
        try {
            _reader = new BufferedReader( new FileReader( input ) );
        } catch ( final FileNotFoundException e ) {
            throw new RuntimeException( e );
        }
    }

    public void close() {
        IOUtils.closeQuietly( _reader );
    }

    public String read() {
        try {
            return _reader.readLine();
        } catch ( final IOException e ) {
            throw new RuntimeException( e );
        }
    }

    public BigDecimal[] readBigDecimals() {
        return readBigDecimals( " " );
    }

    public BigDecimal[] readBigDecimals( final String separator ) {
        final String[] tokens = readTokens( separator );

        final BigDecimal[] values = new BigDecimal[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = new BigDecimal( tokens[ index ] );
        }

        return values;
    }

    public BigInteger[] readBigInts() {
        return readBigInts( " " );
    }

    public BigInteger[] readBigInts( final String separator ) {
        final String[] tokens = readTokens( separator );

        final BigInteger[] values = new BigInteger[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = new BigInteger( tokens[ index ] );
        }

        return values;
    }

    public int readInt() {
        final int[] values = readInts();

        if ( values.length != 1 ) {
            throw new IllegalStateException( "Try to read single interger, but the line contains zero or multiple values" );
        }

        return values[ 0 ];
    }

    public int[] readInts() {
        return readInts( " " );
    }

    public int[] readInts( final String separator ) {
        final String[] tokens = readTokens( separator );

        final int[] values = new int[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = Integer.parseInt( tokens[ index ] );
        }

        return values;
    }

    public long readLong() {
        final long[] values = readLongs();

        if ( values.length != 1 ) {
            throw new IllegalStateException( "Try to read single interger, but the line contains zero or multiple values" );
        }

        return values[ 0 ];
    }

    public long[] readLongs() {
        return readLongs( " " );
    }

    public long[] readLongs( final String separator ) {
        final String[] tokens = readTokens( separator );

        final long[] values = new long[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = Long.parseLong( tokens[ index ] );
        }

        return values;
    }

    public String[] readTokens() {
        return readTokens( " " );
    }

    public String[] readTokens( final String separator ) {
        return read().split( separator );
    }
}

import java.io.*;
import java.util.Scanner;

public class C {

public static void main(String[] args) throws FileNotFoundException, IOException {
     Scanner sc = new Scanner(new FileReader("input.txt"));
     PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));

        int noOfCases = sc.nextInt();

for (int caseNum = 0; caseNum < noOfCases; caseNum++){
	int A = sc.nextInt();
	int B = sc.nextInt();
	int result =0;
	
	if(A<10){
     pw.print("Case #" + (caseNum + 1) + ": 0");
	}
	else if(A<100){
		for (int i = A; i <= B; i++) {
			if(A<=shift2(i) && shift2(i)<=B  && i != shift2(i)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result/2);
	}
	else if(A<1000){
		for (int i = A; i <= B; i++) {
			if(A<=shift3(i) && shift3(i)<=B && i != shift3(i)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result);
	}
	
	if(caseNum < noOfCases-1)
     	pw.println("");
}
     

     pw.flush();
     pw.close();
     sc.close();
}

public static int shift3(int number){
	int r = number % 10;
	number = number/10;
	number = number + r*100;
	return number;	
}

public static int shift2(int number){
	int r = number % 10;
	number = number/10;
	number = number + r*10;
	return number;	
}
}
