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

[Q]: Sentence: 'a person with a cell phone standing next to a train'. Replace the letter 's' with 't' in the sentence.
[A]: a perton with a cell phone ttanding next to a train

[Q]: Sentence: 'a black and white photo of a bird clouds sand and water'. Replace the letter 'b' with 'p' in the sentence.
[A]: a plack and white photo of a pird clouds sand and water

[Q]: Sentence: 'a bathtub with an open window in the wall'. Replace the letter 'w' with 'q' in the sentence.
[A]:
a bathtub qith an open qindoq in the qall