TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'there is a stepladder situated over a toilet'. Replace the letter 'r' with 'x' in the sentence.

SOLUTION: thexe is a stepladdex situated ovex a toilet

PROBLEM: Sentence: 'a police officer on a horse is riding down the street'. Replace the letter 'h' with 'a' in the sentence.

SOLUTION: a police officer on a aorse is riding down tae street

PROBLEM: Sentence: 'a fenced off field with several cows grazing'. Replace the letter 't' with 'l' in the sentence.

SOLUTION:
a fenced off field wilh several cows grazing