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

Sentence: 'a couple of people that are petting a horse'. Replace the letter 'e' with 'p' in the sentence.
a couplp of ppoplp that arp pptting a horsp

Sentence: 'a yellow fire hydrant sitting on the sidewalk'. Replace the letter 'o' with 'd' in the sentence.
a yelldw fire hydrant sitting dn the sidewalk

Sentence: 'the child in the blue sweatshirt is eating a donut'. Replace the letter 'h' with 'z' in the sentence.

tze czild in tze blue sweatszirt is eating a donut