The first word in the list, "loss," changes one letter at a time, beginning with the last letter and moving backwards, yielding "sift." Then the pattern reverses. Starting with the first letter and moving forwards, the spelling of "sift" is altered.
The story's ending is ambiguous. The word "raft" could evolve in two directions, resulting in either the preservation or violation of the protagonist. The viewer may reflect on who or what is involved in determining the outcome.