MaxMonth=12
MaxDay=31
for ((month=1; month <= MaxMonth ; month++))
do
        if ((month < 10)); then
                smonth=0$month
        else
                let "smonth=$month"
        fi

        for ((day=0; day <= MaxDay ; day++))
        do
                if ((day < 10)); then
                        sday=0$day
                else
                        let "sday=$day"
                fi
                echo $smonth$sday
                wget "http://down02.putclub.com/virtual/backup/update/standard/VOA/2006$smonth/2006VOA$smonth$sday.mp3"
        done
done