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

Ex Input:
Sentence: 'three men in a park playing a sport'. Replace the letter 'p' with 'w' in the sentence.

Ex Output:
three men in a wark wlaying a swort


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

Ex Output:
a duitcade id ditting on a didewalk near treed


Ex Input:
Sentence: 'an oven with a silver tray and some brown cake'. Replace the letter 'k' with 's' in the sentence.

Ex Output:

an oven with a silver tray and some brown case