TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a giraffe looking over a fence and another reaching over the fence'. Replace the letter 'l' with 'h' in the sentence.

SOLUTION: a giraffe hooking over a fence and another reaching over the fence

PROBLEM: Sentence: 'a baseball player running on a baseball field'. Replace the letter 'e' with 'h' in the sentence.

SOLUTION: a bashball playhr running on a bashball fihld

PROBLEM: Sentence: 'a tennis player in a field of strawberries'. Replace the letter 'e' with 'u' in the sentence.

SOLUTION:
a tunnis playur in a fiuld of strawburrius