TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'nine geese flying south for the winter months'. Replace the letter 't' with 'f' in the sentence.

SOLUTION: nine geese flying soufh for fhe winfer monfhs

PROBLEM: Sentence: 'small kit bathroom sink with purple walls and lights on it'. Replace the letter 'o' with 'r' in the sentence.

SOLUTION: small kit bathrrrm sink with purple walls and lights rn it

PROBLEM: Sentence: 'the plow is on the train while the train is parked on the tracks'. Replace the letter 'o' with 'd' in the sentence.

SOLUTION:
the pldw is dn the train while the train is parked dn the tracks