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

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

Sentence: 'an old photo of group of people nicely dressed around the end of a long table'. Replace the letter 'e' with 'i' in the sentence.
an old photo of group of piopli nicily drissid around thi ind of a long tabli

Sentence: 'a brown and black dog holding a red frisbee in it's mouth'. Replace the letter 'n' with 'z' in the sentence.

a browz azd black dog holdizg a red frisbee iz it's mouth