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

Ex Input:
Sentence: 'wooden park bench sitting between two trees with grassy background'. Replace the letter 'i' with 'q' in the sentence.

Ex Output:
wooden park bench sqttqng between two trees wqth grassy background


Ex Input:
Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.

Ex Output:
many stxeet signs in fxont of a building while it is snowing


Ex Input:
Sentence: 'a horse that is standing in the sand'. Replace the letter 'e' with 'l' in the sentence.

Ex Output:

a horsl that is standing in thl sand