Sentence Generator (Search and Replace html text)

Hello. I need a simple solution to this: 1. I need to be able to place a string of text in a text area, 2. THEN select a word/phrase within the text AND 3. Replace the 1 selected word or phrase with a list of multiple words which will result in a text file outputting each different string of text containing the newly replaced word. Simple. EXAMPLE: 1. I input the string of text: "Mary went to the store" 2. I select "Mary" 3. I input my list of 100 variables to replace "Mary" (Which would be a list of different words) 4. The program outputs a txt file of 100 different strings of text: "James went to the store" , "Matt went to the store", "Ken went to the store", etc.. ALSO, I would like to be able to take each newly generated string of text and generate 4-5 copies with a unique ending to each of them. EXAMPLE: I would like to take the string of text: "Mary went to the store" and create 4 more strings with the additions: "Mary went to the store 2 days ago" "Mary went to the store 3 days ago" "Mary went to the store 4 days ago" "Mary went to the store 5 days ago"