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

[Q]: Sentence: 'a blue and white train is coming down some tracks'. Replace the letter 'b' with 'u' in the sentence.
[A]: a ulue and white train is coming down some tracks


[Q]: Sentence: 'a person holding a small remote key chain'. Replace the letter 'n' with 'j' in the sentence.
[A]: a persoj holdijg a small remote key chaij


[Q]: Sentence: 'a kitchen filled with appliances and track lighting'. Replace the letter 'f' with 'v' in the sentence.
[A]:
a kitchen villed with appliances and track lighting