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

Example Input: Sentence: 'a street side tree is filled with candles, teddy bears and balloons'. Replace the letter 'e' with 'c' in the sentence.
Example Output: a strcct sidc trcc is fillcd with candlcs, tcddy bcars and balloons

Example Input: Sentence: 'a plate of food which contain smothered meat, potatoes and broccoli'. Replace the letter 'p' with 'v' in the sentence.
Example Output: a vlate of food which contain smothered meat, votatoes and broccoli

Example Input: Sentence: 'the top of a bus with clock tower in the distance'. Replace the letter 'o' with 'u' in the sentence.
Example Output:
the tup uf a bus with cluck tuwer in the distance