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

Ex Input:
Sentence: 'a baby pokes his head out of a suitcase'. Replace the letter 'u' with 's' in the sentence.

Ex Output:
a baby pokes his head ost of a ssitcase


Ex Input:
Sentence: 'a baseball player swings his bat at a pitch'. Replace the letter 's' with 'l' in the sentence.

Ex Output:
a baleball player lwingl hil bat at a pitch


Ex Input:
Sentence: 'two boys in hats walking through an apple orchard'. Replace the letter 't' with 'f' in the sentence.

Ex Output:

fwo boys in hafs walking fhrough an apple orchard