TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a crowd looking at a trio of planes that are sitting idle'. Replace the letter 'a' with 'e' in the sentence.

SOLUTION: e crowd looking et e trio of plenes thet ere sitting idle

PROBLEM: Sentence: 'a male holding a baseball bat standing on a big white star'. Replace the letter 'a' with 'i' in the sentence.

SOLUTION: i mile holding i bisebill bit stinding on i big white stir

PROBLEM: Sentence: 'a boy swinging a toy bat at a ball then throwing it to a man'. Replace the letter 'a' with 'y' in the sentence.

SOLUTION:
y boy swinging y toy byt yt y byll then throwing it to y myn