Basically, we start with a word of 5 letters, like T R I P S - which could produce the sentence "To Rap In Proper Sentences".
The next poster then first answers the previous assignment, and then makes up a new combination for the next poster to answer.
Example:
Answer to Previous Assignment: "TRIPS - To Rap In Proper Sentences"
Next Assignment: "A D M I T"
Next Assignment: "A D M I T"
Previous Assignment: "ADMIT - Any Day Makes A Difference"
Next Assignment: "M A K E S"
...
Let's start with: H O R D E