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

Example Input: Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.
Example Output: some brown blnck nnd white horses clouds nnd rocks

Example Input: Sentence: 'the large modern bathroom has two sinks and a large tub'. Replace the letter 't' with 'j' in the sentence.
Example Output: jhe large modern bajhroom has jwo sinks and a large jub

Example Input: Sentence: 'white apartment building with various out of place furniture'. Replace the letter 'o' with 'n' in the sentence.
Example Output:
white apartment building with varinus nut nf place furniture