TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'people walk through a local fruit market in a city'. Replace the letter 'e' with 'n' in the sentence.

SOLUTION: pnopln walk through a local fruit marknt in a city

PROBLEM: Sentence: 'a basket holds flowers, twigs, and various fruits'. Replace the letter 'a' with 'g' in the sentence.

SOLUTION: g bgsket holds flowers, twigs, gnd vgrious fruits

PROBLEM: Sentence: 'a man sitting on a set of stairs with a box in front of a church with two large wooden doors'. Replace the letter 's' with 'n' in the sentence.

SOLUTION:
a man nitting on a net of ntairn with a box in front of a church with two large wooden doorn