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

Example Input: Sentence: 'a black and white image of a vehicle that is decorated like a dog'. Replace the letter 'a' with 'p' in the sentence.
Example Output: p blpck pnd white impge of p vehicle thpt is decorpted like p dog

Example Input: Sentence: 'a man riding a snowboard on the side of a wall'. Replace the letter 'm' with 'p' in the sentence.
Example Output: a pan riding a snowboard on the side of a wall

Example Input: Sentence: 'a group of sailors sitting in front of a control area'. Replace the letter 't' with 'y' in the sentence.
Example Output:
a group of sailors siyying in frony of a conyrol area