perl - Need Regex For Enter mark content -

I want to enter mark the material below please regex help.

I \ S * and \ t * and \ r and \ n ..etc, but can not.

  dslkjflkds lksdfds slkdjlkds sdlkdslkjhgfsd slkdfjhldsjfds slkjdsjhlsd sldfldsjf sldfjhldsjhflds   
 
 I've tried to find the icon is copied to your text, and more than one entry. 
 
 does 
 
  (\ n) {2,}  
 
 works for me, hope it helps with the is