TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a tower type building structure with a large clock and many windows in front of a cloudy blue sky'. Replace the letter 'n' with 'x' in the sentence.

SOLUTION: a tower type buildixg structure with a large clock axd maxy wixdows ix froxt of a cloudy blue sky

PROBLEM: Sentence: 'a room with a bed, lamps, tables and pillows'. Replace the letter 's' with 'b' in the sentence.

SOLUTION: a room with a bed, lampb, tableb and pillowb

PROBLEM: Sentence: 'a table with electronics such as a computer, cell phone, laptop and a cordless phone'. Replace the letter 'c' with 'd' in the sentence.

SOLUTION:
a table with eledtronids sudh as a domputer, dell phone, laptop and a dordless phone