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

Input: Consider Input: Sentence: 'a red train moves over snowy rail road tracks'. Replace the letter 'v' with 'w' in the sentence.

Output: a red train mowes ower snowy rail road tracks

Input: Consider Input: Sentence: 'a man is on a saddled horse with reins'. Replace the letter 's' with 'o' in the sentence.

Output: a man io on a oaddled horoe with reino

Input: Consider Input: Sentence: 'a kid that is skateboarding on some wood blocks'. Replace the letter 'k' with 'l' in the sentence.
Output: a lid that is slateboarding on some wood blocls