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

Example Input: Sentence: 'a bus parked on the side of the road'. Replace the letter 'o' with 'd' in the sentence.
Example Output: a bus parked dn the side df the rdad

Example Input: Sentence: 'a white plate topped with two sandwich halves and a pile of potatoes chips'. Replace the letter 'o' with 'x' in the sentence.
Example Output: a white plate txpped with twx sandwich halves and a pile xf pxtatxes chips

Example Input: Sentence: 'a red motorcycle driving down a race track'. Replace the letter 'g' with 's' in the sentence.
Example Output:
a red motorcycle drivins down a race track