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

[EX Q]: Sentence: 'a couple of horses with carriages at a building'. Replace the letter 'u' with 'm' in the sentence.
[EX A]: a comple of horses with carriages at a bmilding

[EX Q]: Sentence: 'a person flying a kite on the beach  between some trees'. Replace the letter 's' with 'k' in the sentence.
[EX A]: a perkon flying a kite on the beach  between kome treek

[EX Q]: Sentence: 'a man riding skis down a snow covered skis slope'. Replace the letter 'o' with 'x' in the sentence.
[EX A]:
a man riding skis dxwn a snxw cxvered skis slxpe