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

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 man sitting in a chair with a laptop in his lap'. Replace the letter 'p' with 'v' in the sentence.

Ex Output:
a man sitting in a chair with a lavtov in his lav

Ex Input:
Sentence: 'the dog is walking on the leash down the street'. Replace the letter 'e' with 'h' in the sentence.

Ex Output:
thh dog is walking on thh lhash down thh strhht