In the given arrangement, the words have been arranged alphabetically in a sequence, altering the position of only one word in each step.
Input :- Over Go For through at one
Step I :- at Over Go For through one
Step II :- at For Over Go through one
Step III :- at For Go Over through one
Step IV :- at For Go one Over through
Since all the words in the given input have been arranged alphabetically uptil Step IV, so it is the last step.