TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a young baseball player throws the ball as others watch'. Replace the letter 'a' with 'n' in the sentence.

SOLUTION: n young bnsebnll plnyer throws the bnll ns others wntch

PROBLEM: Sentence: 'a bus parked on the side of the road'. Replace the letter 'o' with 'd' in the sentence.

SOLUTION: a bus parked dn the side df the rdad

PROBLEM: Sentence: 'a person being down on one knee playing tennis'. Replace the letter 'n' with 'v' in the sentence.

SOLUTION:
a persov beivg dowv ov ove kvee playivg tevvis