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

[EX Q]: Sentence: 'a chocolate cake decorated with strawberries on the side'. Replace the letter 'c' with 'x' in the sentence.
[EX A]: a xhoxolate xake dexorated with strawberries on the side

[EX Q]: Sentence: 'a mobile phone and a set of keys on a key chain'. Replace the letter 's' with 'j' in the sentence.
[EX A]: a mobile phone and a jet of keyj on a key chain

[EX Q]: Sentence: 'a couple of sheep standing in a metal pen'. Replace the letter 'p' with 'f' in the sentence.
[EX A]:
a coufle of sheef standing in a metal fen