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

Ex Input:
Sentence: 'a baseball player holding a bat in front of catcher and umpire'. Replace the letter 'i' with 'k' in the sentence.

Ex Output:
a baseball player holdkng a bat kn front of catcher and umpkre


Ex Input:
Sentence: 'a big bowl of brown food halfway in a small oven'. Replace the letter 'v' with 'k' in the sentence.

Ex Output:
a big bowl of brown food halfway in a small oken


Ex Input:
Sentence: 'a blue stop sign located near two pots of flowers'. Replace the letter 'd' with 'n' in the sentence.

Ex Output:

a blue stop sign locaten near two pots of flowers