TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'two giraffe standing in an enclosure at the zoo next to a tree'. Replace the letter 'n' with 'g' in the sentence.

SOLUTION: two giraffe stagdigg ig ag egclosure at the zoo gext to a tree

PROBLEM: Sentence: 'a man in black shirt laying on bed with a teddy bear'. Replace the letter 'd' with 'b' in the sentence.

SOLUTION: a man in black shirt laying on beb with a tebby bear

PROBLEM: Sentence: 'a baseball player swings his bat behind his head'. Replace the letter 'h' with 'y' in the sentence.

SOLUTION:
a baseball player swings yis bat beyind yis yead