TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a baseball player is throwing a ball across the dirt field'. Replace the letter 'a' with 't' in the sentence.

SOLUTION: t btsebtll pltyer is throwing t btll tcross the dirt field

PROBLEM: Sentence: 'a chocolate cake decorated with strawberries on the side'. Replace the letter 'c' with 'x' in the sentence.

SOLUTION: a xhoxolate xake dexorated with strawberries on the side

PROBLEM: Sentence: 'people on a hill flying two large kites in the sky'. Replace the letter 'n' with 'l' in the sentence.

SOLUTION:
people ol a hill flyilg two large kites il the sky