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

Ex Input:
Sentence: 'four people are playing an interesting game in the park'. Replace the letter 'e' with 'x' in the sentence.

Ex Output:
four pxoplx arx playing an intxrxsting gamx in thx park


Ex Input:
Sentence: 'small kit bathroom sink with purple walls and lights on it'. Replace the letter 'o' with 'r' in the sentence.

Ex Output:
small kit bathrrrm sink with purple walls and lights rn it


Ex Input:
Sentence: 'a man laying on top of a couch sleeping'. Replace the letter 'c' with 'e' in the sentence.

Ex Output:

a man laying on top of a eoueh sleeping