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.*;


class RecycledNumbers
{	
	public static void main(String a[]) throws Exception
	{
		BufferedReader br=new BufferedReader( new InputStreamReader(System.in) );
		int testCases=Integer.parseInt(br.readLine());
		int counter=0;
		
		for(int i=0;i<testCases;i++)
		{
			int count=0;
			String [] s=br.readLine().split(" ");
			int lowerLimit=Integer.parseInt(s[0]);
			int upperLimit=Integer.parseInt(s[1]);
			// all the combinations
			int noOfCombinations=s[0].length();
			for(int number=lowerLimit;number<=upperLimit;number++)
			{
				// System.out.print(number);
				int temp=number;
				int lastDigit=0;
				int [] doubling=new int[noOfCombinations];
				for(int ii=0;ii<noOfCombinations-1;ii++)
				{
					lastDigit=temp%10;
					// System.out.print("lastDigit-"+lastDigit);
					temp=(temp/10)+(int)Math.pow(10,(noOfCombinations-1))*lastDigit;
					// System.out.print("::::"+temp);
					if( (number<temp) && (temp<=upperLimit) )
					{
						doubling[ii]=temp;
						int j=0;
						for(j=0;j<ii;j++)
						{
							if(temp==doubling[j])
								break;
						}
						if(j==ii)		
						{
							count++;
							// System.out.println(number+" : "+temp);
						}
					}
				}
				
			}
			//str is changed now, to set to original add ""str=str.charAt(noOfCombinations)+str.substring(noOfCombinations-1);""
			System.out.println("Case #"+(++counter)+": "+count);
		}
	}
	

}