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 woman in blue jacket shaving a cows utters'. Replace the letter 'h' with 'q' in the sentence.

Ex Output:
a woman in blue jacket sqaving a cows utters

Ex Input:
Sentence: 'a woman holding up a pair of blue scissors'. Replace the letter 'l' with 'd' in the sentence.

Ex Output:
a woman hodding up a pair of bdue scissors