TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a sign sitting on the side of a snow covered slope'. Replace the letter 'e' with 'g' in the sentence.

SOLUTION: a sign sitting on thg sidg of a snow covgrgd slopg

PROBLEM: Sentence: 'a man standing on a tennis court holding a tennis racquet'. Replace the letter 'c' with 'y' in the sentence.

SOLUTION: a man standing on a tennis yourt holding a tennis rayquet

PROBLEM: Sentence: 'little girl reaching through fence to pet a giraffe'. Replace the letter 'p' with 'm' in the sentence.

SOLUTION:
little girl reaching through fence to met a giraffe

