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

Ex Input:
Sentence: 'a refrigerator with both its doors open in a kitchen'. Replace the letter 'o' with 'x' in the sentence.

Ex Output:
a refrigeratxr with bxth its dxxrs xpen in a kitchen


Ex Input:
Sentence: 'an image of a small galley-style kitchen pointed towards a skinny door'. Replace the letter 's' with 'i' in the sentence.

Ex Output:
an image of a imall galley-ityle kitchen pointed towardi a ikinny door


Ex Input:
Sentence: 'a dog sitting next to a double seated red bicycle'. Replace the letter 'n' with 'u' in the sentence.

Ex Output:

a dog sittiug uext to a double seated red bicycle