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 person holding a small remote key chain'. Replace the letter 'n' with 'j' in the sentence.
a persoj holdijg a small remote key chaij

Sentence: 'a person sitting next to a bicycle while watching pigeons on a sidewalk'. Replace the letter 'p' with 'q' in the sentence.

a qerson sitting next to a bicycle while watching qigeons on a sidewalk