ravdastri

if [ $2 = "-a" ]
then
        for i in "$(ls $1)"
        do
        echo $i
                mv "$1/$i" "$1/$i$3"
        done
else
        if [ $2 = "-b" ]
        then
                for i in 'ls $1'
                do
                        mv "$1/$i" "$1/$3$i"
                done
        fi
fi