In this task, you need to replace a letter in the sentence with another given letter.

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

Sentence: 'a toilet and a microwave sitting out for the trash'. Replace the letter 'i' with 's' in the sentence.
a toslet and a mscrowave ssttsng out for the trash

Sentence: 'a man is struggling to climb up a snow covered mountain'. Replace the letter 'i' with 'w' in the sentence.

a man ws strugglwng to clwmb up a snow covered mountawn