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

Example Input: Sentence: 'black and white image of a tattoo and piercing sign in a city'. Replace the letter 'e' with 'h' in the sentence.
Example Output: black and whith imagh of a tattoo and pihrcing sign in a city

Example Input: Sentence: 'two people are passing a man playing a piano on the street'. Replace the letter 'o' with 'i' in the sentence.
Example Output: twi peiple are passing a man playing a piani in the street

Example Input: Sentence: 'a person holding the head of a small wet dog'. Replace the letter 'i' with 'v' in the sentence.
Example Output:
a person holdvng the head of a small wet dog