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

Ex Input:
Sentence: 'a couch, footrest, tv and other furniture are arranged in a living room'. Replace the letter 'o' with 'g' in the sentence.

Ex Output:
a cguch, fggtrest, tv and gther furniture are arranged in a living rggm


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: 'cross country skiers on a ski trail between trees'. Replace the letter 's' with 'g' in the sentence.

Ex Output:

crogg country gkierg on a gki trail between treeg