notepad++ regex.txt

# add blank lines between lines
find: \R
replace: $0$0

# add string to blank lines
find: ^(?:[\t ]*(?:\r?\n|\r))+
replace: the string

# add string at the end of each line 
find: $
replace: the string

# add qoutes at the start and end of each line
find: (.+)
replace: "\1"

# add string to the start of ecach line 
find: ^
replace: cd 

# convert multiline to single line
find: \R
replace: leave it empty

#remove duplicate lines (the bothe the orignal and the duplicate)
^(.+(?:\R|$))\1+