TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man has his hand on top of a blender'. Replace the letter 'd' with 'o' in the sentence.

SOLUTION: a man has his hano on top of a blenoer

PROBLEM: Sentence: 'street sign titled kittery maine state line in green'. Replace the letter 'e' with 'r' in the sentence.

SOLUTION: strrrt sign titlrd kittrry mainr statr linr in grrrn

PROBLEM: Sentence: 'a couple if birds walking through a muddy river'. Replace the letter 'r' with 'f' in the sentence.

SOLUTION:
a couple if bifds walking thfough a muddy fivef