TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a silly cow licking the camera through a fence'. Replace the letter 't' with 'v' in the sentence.

SOLUTION: a silly cow licking vhe camera vhrough a fence

PROBLEM: Sentence: 'a gate with a stop sign blocking the road'. Replace the letter 'h' with 'y' in the sentence.

SOLUTION: a gate wity a stop sign blocking tye road

PROBLEM: Sentence: 'a woman walking down a street holding an umbrella'. Replace the letter 'n' with 'k' in the sentence.

SOLUTION:
a womak walkikg dowk a street holdikg ak umbrella