TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a cat with a pink bow sits underneath something silver'. Replace the letter 'h' with 'n' in the sentence.

SOLUTION: a cat witn a pink bow sits underneatn sometning silver

PROBLEM: Sentence: 'lose up of various trays of croissants and muffins'. Replace the letter 'n' with 'f' in the sentence.

SOLUTION: lose up of various trays of croissafts afd muffifs

PROBLEM: Sentence: 'bunk beds occupy one corner in a bedroom'. Replace the letter 'r' with 'q' in the sentence.

SOLUTION:
bunk beds occupy one coqneq in a bedqoom