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

Sentence: 'a man walking a horse on a dirt track'. Replace the letter 't' with 's' in the sentence.
a man walking a horse on a dirs srack

Sentence: 'a pizza sitting on top of a metal pizza pan'. Replace the letter 'p' with 't' in the sentence.
a tizza sitting on tot of a metal tizza tan

Sentence: 'a couple of men on hot rod motorcycles parked in a lot'. Replace the letter 'o' with 'u' in the sentence.

a cuuple uf men un hut rud muturcycles parked in a lut