In this task, you need to replace a letter in the sentence with another given letter.

Example Input: Sentence: 'a man is on a bed with a cat and laptop computer'. Replace the letter 'e' with 'n' in the sentence.
Example Output: a man is on a bnd with a cat and laptop computnr

Example Input: Sentence: 'the living room is designed with brown and beige colors'. Replace the letter 'i' with 'b' in the sentence.
Example Output: the lbvbng room bs desbgned wbth brown and bebge colors

Example Input: Sentence: 'an artistic clock tower on display on a pier'. Replace the letter 'o' with 'n' in the sentence.
Example Output:
an artistic clnck tnwer nn display nn a pier