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.*;
public class RecycledNo
{
public static void main (String arg[]) throws Exception
{
BufferedReader ob=new BufferedReader (new FileReader("C-small-attempt2.in"));

PrintWriter pw=new PrintWriter ("output.txt");

String temp="";
temp=ob.readLine();
int t=Integer.parseInt(temp);
int a=0,b=0;

for(int l=1;l<=t;l++)
{
 temp=ob.readLine();
 String str="";

 for(int i=0;i<temp.length();i++)
 {
  char ch=temp.charAt(i);
  if(ch==' ')
  {
  a=Integer.parseInt(str);
  str="";
  continue;
  }
  str=str+ch;
 } 
 b=Integer.parseInt(str); 
 int count=0;
 str="";
 for(int k=a;k<=b;k++) 
 {
  str=""+k;
  String s[]=new String[str.length()];
  for(int i=0;i<str.length();i++)
  {
  char ch=str.charAt(i);
  s[i]=""+ch;
  }
  for(int i=1;i<str.length();i++)
  {
  temp=s[0];
  for(int j=0;j<str.length()-1;j++)
  {
  s[j]=s[j+1];
  }
  s[str.length()-1]=temp;
  String R="";
  for(int j=0;j<str.length();j++)
  {
  R=R+s[j];
  }
  int tmp=Integer.parseInt(R);
  if(tmp<=b && tmp>k)
  count++;
  }
 }
 temp="Case #"+l+": "+count;
 pw.println(temp);
}
pw.close();
}
}
