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

Input: Consider Input: Sentence: 'a suitcase is sitting on a sidewalk near trees'. Replace the letter 's' with 'd' in the sentence.

Output: a duitcade id ditting on a didewalk near treed


Input: Consider Input: Sentence: 'a person on a snow board flying through the air'. Replace the letter 'f' with 'n' in the sentence.

Output: a person on a snow board nlying through the air


Input: Consider Input: Sentence: 'a city street scene on a bridge with a bus on the road and pedestrians on the side'. Replace the letter 'p' with 'a' in the sentence.


Output: a city street scene on a bridge with a bus on the road and aedestrians on the side