TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'the bus is trying to navigate though the london traffic'. Replace the letter 'a' with 'l' in the sentence.

SOLUTION: the bus is trying to nlviglte though the london trlffic

PROBLEM: Sentence: 'black and white image of a tattoo and piercing sign in a city'. Replace the letter 'e' with 'h' in the sentence.

SOLUTION: black and whith imagh of a tattoo and pihrcing sign in a city

PROBLEM: Sentence: 'a man reaching out towards a blue frisbee'. Replace the letter 'i' with 'g' in the sentence.

SOLUTION:
a man reachgng out towards a blue frgsbee