for i in *.mp3
do
    num=`echo "$i" | awk -F ' - ' '{print substr($3,1,2)}'`
    max=`echo "$i" | awk -F ' - ' '/END/ {print end} {end = substr($3,1,2)}'
    id3v2 -a "artist" -A "album" -t "artist - album - track $num" -T "$num/$end"
done