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

Sentence: 'a police officer on a horse is riding down the street'. Replace the letter 'h' with 'a' in the sentence.
a police officer on a aorse is riding down tae street

Sentence: 'two tennis players shaking hands over the net'. Replace the letter 'n' with 'f' in the sentence.
two teffis players shakifg hafds over the fet

Sentence: 'vases of various size, shape, and color on display'. Replace the letter 'v' with 'm' in the sentence.

mases of marious size, shape, and color on display