Definition: In this task, you need to replace a letter in the sentence with another given letter.
Input: Sentence: 'the clock towers over the rest of the city'. Replace the letter 'r' with 'n' in the sentence.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
the clock towens oven the nest of the city