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

Ex Input:
Sentence: 'a horse in a country field with woods in the background'. Replace the letter 'a' with 'i' in the sentence.

Ex Output:
i horse in i country field with woods in the bickground


Ex Input:
Sentence: 'a large orange cat sits in a chair outside'. Replace the letter 'e' with 'x' in the sentence.

Ex Output:
a largx orangx cat sits in a chair outsidx


Ex Input:
Sentence: 'a young adult is standing in the snow with some type of stick'. Replace the letter 'a' with 'y' in the sentence.

Ex Output:

y young ydult is stynding in the snow with some type of stick