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

Example Input: Sentence: 'a man in black shirt laying on bed with a teddy bear'. Replace the letter 'd' with 'b' in the sentence.
Example Output: a man in black shirt laying on beb with a tebby bear

Example Input: Sentence: 'a man sitting at a table and using his laptop'. Replace the letter 'd' with 'o' in the sentence.
Example Output: a man sitting at a table ano using his laptop

Example Input: Sentence: 'two parking meters in front of a black and yellow background'. Replace the letter 'l' with 'y' in the sentence.
Example Output:
two parking meters in front of a byack and yeyyow background