In this task, you need to replace a letter in the sentence with another given letter.
--------
Question: Sentence: 'a black cat is sniffing a glass bottle'. Replace the letter 'c' with 'f' in the sentence.

Answer: a blafk fat is sniffing a glass bottle


Question: Sentence: 'a person is riding a skateboard in a skateboard park'. Replace the letter 'a' with 'o' in the sentence.

Answer: o person is riding o skoteboord in o skoteboord pork


Question: Sentence: 'a person pressing buttons on a phone in their hand'. Replace the letter 's' with 'u' in the sentence.

Answer:
a peruon preuuing buttonu on a phone in their hand