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

[EX Q]: Sentence: 'a person under an open umbrella in the sand'. Replace the letter 'd' with 'h' in the sentence.
[EX A]: a person unher an open umbrella in the sanh

[EX Q]: Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.
[EX A]: some brown blnck nnd white horses clouds nnd rocks

[EX Q]: Sentence: 'a tennis player is about to return a serve'. Replace the letter 't' with 'k' in the sentence.
[EX A]:
a kennis player is abouk ko rekurn a serve