TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a fire hydrant and a rolled up fire hose'. Replace the letter 'd' with 's' in the sentence.

SOLUTION: a fire hysrant ans a rolles up fire hose

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 woman standing in the snow on a pair of skis'. Replace the letter 'o' with 'c' in the sentence.

SOLUTION:
a wcman standing in the sncw cn a pair cf skis