TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'an overhead view of a city cross walk on a rainy day features an array of colorful umbrellas'. Replace the letter 's' with 'd' in the sentence.

SOLUTION: an overhead view of a city crodd walk on a rainy day featured an array of colorful umbrellad

PROBLEM: Sentence: 'there is a big room with furniture and items inside'. Replace the letter 'e' with 'k' in the sentence.

SOLUTION: thkrk is a big room with furniturk and itkms insidk

PROBLEM: Sentence: 'a blue ball of yarn with a needle sticking out and a small pair of scissor in the console of a grey car'. Replace the letter 'a' with 'l' in the sentence.

SOLUTION:
l blue blll of ylrn with l needle sticking out lnd l smlll plir of scissor in the console of l grey clr