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 broken suitcase on a small tile floor with the contents exposed'. Replace the letter 'u' with 'z' in the sentence.

Ex Output:
a broken szitcase on a small tile floor with the contents exposed

Ex Input:
Sentence: 'people on an inside court playing with a frisbee'. Replace the letter 'n' with 'g' in the sentence.

Ex Output:
people og ag igside court playigg with a frisbee