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

Example Input: Sentence: 'two parrots on a tree next to a metal pan'. Replace the letter 'w' with 'j' in the sentence.
Example Output: tjo parrots on a tree next to a metal pan

Example Input: Sentence: 'a waterview with multiple boats in the water'. Replace the letter 'r' with 'w' in the sentence.
Example Output: a watewview with multiple boats in the watew

Example Input: Sentence: 'a tiger cat sitting in a bathroom sink next to a tub'. Replace the letter 'i' with 'n' in the sentence.
Example Output:
a tnger cat snttnng nn a bathroom snnk next to a tub