TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a couple of kids laying in bed together'. Replace the letter 'o' with 'v' in the sentence.

SOLUTION: a cvuple vf kids laying in bed tvgether

PROBLEM: Sentence: 'a man is somewhat hard to be seen in the wave, on his board'. Replace the letter 's' with 'b' in the sentence.

SOLUTION: a man ib bomewhat hard to be been in the wave, on hib board

PROBLEM: Sentence: 'an unfinished bathroom with a bath tub and a mirror'. Replace the letter 'm' with 'g' in the sentence.

SOLUTION:
an unfinished bathroog with a bath tub and a girror