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

Ex Input:
Sentence: 'there is a big room with furniture and items inside'. Replace the letter 'e' with 'k' in the sentence.

Ex Output:
thkrk is a big room with furniturk and itkms insidk


Ex Input:
Sentence: 'a person who is looking at their cell phone'. Replace the letter 'o' with 'b' in the sentence.

Ex Output:
a persbn whb is lbbking at their cell phbne


Ex Input:
Sentence: 'a small cat is standing near the computer keyboard'. Replace the letter 'e' with 'k' in the sentence.

Ex Output:

a small cat is standing nkar thk computkr kkyboard