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

Sentence: 'a double decker bus stopped outside a station on a street'. Replace the letter 'c' with 'y' in the sentence.
a double deyker bus stopped outside a station on a street

Sentence: 'a cat sits on the floor next to a purse'. Replace the letter 'a' with 'b' in the sentence.
b cbt sits on the floor next to b purse

Sentence: 'a baseball player gets ready to hit the ball'. Replace the letter 'y' with 'c' in the sentence.

a baseball placer gets readc to hit the ball