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

Ex Input:
Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.

Ex Output:
a bunsh of signs on a pole on the street


Ex Input:
Sentence: 'a man taking a photo of food on a table'. Replace the letter 't' with 'h' in the sentence.

Ex Output:
a man haking a phoho of food on a hable


Ex Input:
Sentence: 'a street sign with a sky in the background'. Replace the letter 'e' with 'n' in the sentence.

Ex Output:

a strnnt sign with a sky in thn background