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

Sentence: 'a red train sitting at an empty station'. Replace the letter 'i' with 'h' in the sentence.
a red trahn shtthng at an empty stathon

Sentence: 'an elephant in chains converses with a smaller elephant who is not wearing chains'. Replace the letter 'i' with 'm' in the sentence.
an elephant mn chamns converses wmth a smaller elephant who ms not wearmng chamns

Sentence: 'a large blue double decker bus driving down a road with red brick buildings'. Replace the letter 'o' with 'r' in the sentence.

a large blue druble decker bus driving drwn a rrad with red brick buildings