:>no_2008.txt
:>no_2009.txt
while read line; do
        ad=$(echo $line | awk -F, '{ print $1 }')
        sd=$(echo $line | awk -F, '{ print $2 }')
        no=$(echo $line | awk -F, '{ print $3 }')
        yno=${no:1:1}
        [ $yno -eq 8 ] && echo $ad,$sd,$no >>no_2008.txt
        [ $yno -eq 9 ] && echo $ad,$sd,$no >>no_2009.txt
done <foo.txt