TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a black velvety chair with chrome colored frame'. Replace the letter 'a' with 'z' in the sentence.

SOLUTION: z blzck velvety chzir with chrome colored frzme

PROBLEM: Sentence: 'an umbrella sitting on top of a hill next to a body of water'. Replace the letter 't' with 'b' in the sentence.

SOLUTION: an umbrella sibbing on bop of a hill nexb bo a body of waber

PROBLEM: Sentence: 'a package of meat surrounded by milk and some fruit and veggies'. Replace the letter 'f' with 'l' in the sentence.

SOLUTION:
a package ol meat surrounded by milk and some lruit and veggies