Write code to break up a string variable my_str into a list of words called my_lst where each word is separated from the next by a colon (:). If the number of elements in the list is less than 5, print out a new_lst which is the same as my_lst. Otherwise, return the 4^thand 5^thword from the list and store it in new_lst.For example, if my_str ='Chetna:Akshayapatra:Asha:Ekal:Pratham:AimFor Seva' then the results should be['Ekal', 'Pratham'].