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

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: 'a dirt bike rider that is riding in the mud'. Replace the letter 'a' with 'o' in the sentence.
Example Output: o dirt bike rider thot is riding in the mud

Example Input: Sentence: 'a close up of fruits wrapped in plastic bags'. Replace the letter 'e' with 'z' in the sentence.
Example Output:
a closz up of fruits wrappzd in plastic bags