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

[Q]: Sentence: 'a close up of a train on train tracks at night'. Replace the letter 'n' with 'm' in the sentence.
[A]: a close up of a traim om traim tracks at might

[Q]: Sentence: 'a plane getting ready to land on a runway'. Replace the letter 'n' with 'o' in the sentence.
[A]: a plaoe gettiog ready to laod oo a ruoway

[Q]: Sentence: 'a couple of giraffe standing next to each other'. Replace the letter 't' with 'i' in the sentence.
[A]:
a couple of giraffe sianding nexi io each oiher