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 );
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package codejam;

import java.io.*;

/**
 *
 * @author wijebandara
 */
public class RecycledNumbers {
    public static void main(String[] args) throws FileNotFoundException, IOException {

        //java.io.BufferedReader in = new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
        java.io.BufferedReader in=new java.io.BufferedReader(new java.io.FileReader("/home/wijebandara/Desktop/C-small-attempt0.in"));
        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("/home/wijebandara/Desktop/C-small-attempt0.out")));

        int n = Integer.parseInt(in.readLine());
        
        java.util.StringTokenizer st ;
        for(int i=0;i<n;i++)
        {
            st=new java.util.StringTokenizer(in.readLine());
            
            int a=Integer.parseInt(st.nextToken());
            int b=Integer.parseInt(st.nextToken());
            int ans=0;
            for(int j=a;j<=b;j++)
            {
                java.util.ArrayList <Integer> l =new java.util.ArrayList<Integer>();
                int h =(int)Math.log10(j);
                for(int k=1;k<=h;k++)
                {
                    int p=change(j,k);
                    if(p>j && !l.contains(p) && p>=a && p<=b)
                    {
                        l.add(p);
                        ans++;
                    }
                }
            }
            System.out.print("Case #" + (i + 1) + ": ");
            out.print("Case #" + (i + 1) + ": ");
            System.out.println(ans);
            out.println(ans);
        }
        out.close();
    }
    static int change(int x,int n)
    {
        int a=(int)(Math.pow(10, n));
        int hold=x%a;

        int b =(int)Math.log10(x)+1;
        x=(x-hold)/a;

        return hold*(int)Math.pow(10, b-n)+x;
    } 
}
