TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a shower, toilet and sink are highlights in this clean bathroom'. Replace the letter 'e' with 'd' in the sentence.

SOLUTION: a showdr, toildt and sink ard highlights in this cldan bathroom

PROBLEM: Sentence: 'a patio filled with white tables and chairs covered with umbrellas'. Replace the letter 'o' with 'e' in the sentence.

SOLUTION: a patie filled with white tables and chairs cevered with umbrellas

PROBLEM: Sentence: 'several kits are flying at a beach on a cloudy day'. Replace the letter 'e' with 'z' in the sentence.

SOLUTION:
szvzral kits arz flying at a bzach on a cloudy day