In this task, you need to replace a letter in the sentence with another given letter.

Sentence: 'a tennis racket is sitting in the middle of a tennis field'. Replace the letter 'i' with 'f' in the sentence.
a tennfs racket fs sfttfng fn the mfddle of a tennfs ffeld

Sentence: 'a pink table topped with plates and bowls of food'. Replace the letter 'p' with 'x' in the sentence.
a xink table toxxed with xlates and bowls of food

Sentence: 'a blue train on a track next to another track'. Replace the letter 'a' with 't' in the sentence.

t blue trtin on t trtck next to tnother trtck