TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man is standing at the base ball triangle with bat in tow'. Replace the letter 'n' with 'c' in the sentence.

SOLUTION: a mac is stacdicg at the base ball triacgle with bat ic tow

PROBLEM: Sentence: 'a family opens gifts in a room with their dog, while sitting on couches'. Replace the letter 's' with 'l' in the sentence.

SOLUTION: a family openl giftl in a room with their dog, while litting on couchel

PROBLEM: Sentence: 'a person is piercing an apple with a small, sharp knife'. Replace the letter 'a' with 't' in the sentence.

SOLUTION:
t person is piercing tn tpple with t smtll, shtrp knife