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.*;
public class q3
{
	public static void main(String []args) throws IOException
	{
		
		
		 PrintWriter pw=new PrintWriter(new BufferedWriter(new FileWriter("output.txt")));
	   BufferedReader br=new BufferedReader(new FileReader("input.txt"));
		int arr[]=new int[2];
		int limit=Integer.parseInt(br.readLine());
		String x2;
		int count=0;
		for(int li=1;li<=limit;li++)
	   {count=0;
	   	   x2=br.readLine();
	   	      int j=0;
	   	   StringTokenizer st =new StringTokenizer(x2);
	   	   while (st.hasMoreElements()) {

              String token = st.nextElement().toString();
               arr[j]=Integer.parseInt(token);
                 j++;
           }
           
           for(int a1=arr[0];a1<=arr[1];a1++)
           { 
           	  String x1=String.valueOf(a1);
           	  int l=x1.length();
           	  String final1="";
           	  for(int x=1;x<=(l-1);x++)
		     	{
			
			      final1=x1.substring(l-x,l)+x1.substring(0,l-x);
			          int check=Integer.parseInt(final1);
			      if(a1<check&&check<=arr[1])
			      {
			      	      count++;
			        
			          }
			    }
           	  final1="";
           }    
            
	        pw.println("Case #"+li+": "+count);
	   
	   }
	    pw.close();
	}
}