TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'wooden park bench sitting between two trees with grassy background'. Replace the letter 'i' with 'q' in the sentence.

SOLUTION: wooden park bench sqttqng between two trees wqth grassy background

PROBLEM: Sentence: 'a group of sheep is standing in a grassy field'. Replace the letter 'g' with 'p' in the sentence.

SOLUTION: a proup of sheep is standinp in a prassy field

PROBLEM: Sentence: 'an old rusty car sits outside of an old building'. Replace the letter 'o' with 'r' in the sentence.

SOLUTION:
an rld rusty car sits rutside rf an rld building