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.util.*;
import java.io.*;
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

public class q_b {
	
	public static void main(String [] args) {		
		
		// Open files
		try {
			// Open input file
			FileInputStream iStream = new FileInputStream("Sample.in");
			// Get the DataInputStream object
			DataInputStream in = new DataInputStream(iStream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			
			System.out.println("Input file opened");
			
			// Create output file 
			FileWriter oStream = new FileWriter("Sample.out");
			BufferedWriter out = new BufferedWriter(oStream);
			
			System.out.println("Output file opened");
			
			// Read File Line By Line (and read first line)
			String strLine = br.readLine();
			int testN = Integer.parseInt(strLine);
			int caseN = 1;
			while ((strLine = br.readLine()) != null) {
 
				String[] nums = strLine.split(" ");
				
				int a = Integer.parseInt(nums[0]);
				int b = Integer.parseInt(nums[1]);
				
				int nDigits = nums[0].length();

				out.write("Case #" + caseN + ": ");
				System.out.println(a+" "+b+"             \tCase #" + caseN + ": ");
				
				if (nDigits < 2) {
					out.write("0");
					out.newLine();
					System.out.println("0");
					caseN++;
					continue;
				}
				
				int pow = 1;
				for(int i=0;i<nDigits-1;i++) pow = pow *10;
				
				int nPairs = 0;
					
				for (int i=a; i <= b; i++) {			
					
					int j = i;			
					int k = j;
					System.out.print(j+" ");
					int m = 0;

					for(int z=1; z<nDigits; z++) {
						m = j % 10;
						
						j = j/10 + m*pow;
						
						System.out.print(j+" ");
						if (j <= i || m == 0 || j > b || j == k) continue;
						nPairs++;
						System.out.print("*** ");
						k = j;
					}
					System.out.println();
				}

				String result = Integer.toString(nPairs);
				System.out.println(result);
				out.write(result);
				if (caseN != testN) out.newLine();
				caseN++;
			}
			// Close the streams
			in.close();
			out.close();
		}catch (Exception e) {// Catch exception if any
			System.err.println("Error: " + e.getMessage());
		}		
	}

}