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

Example Input: Sentence: 'a woman in a dining-room holding a knife, cutting a cake on the table'. Replace the letter 'i' with 'p' in the sentence.
Example Output: a woman pn a dpnpng-room holdpng a knpfe, cuttpng a cake on the table

Example Input: Sentence: 'a person standing on some skis going through the snow'. Replace the letter 'o' with 'l' in the sentence.
Example Output: a persln standing ln slme skis gling thrlugh the snlw

Example Input: Sentence: 'a small plastic dish with food in it'. Replace the letter 'p' with 'g' in the sentence.
Example Output:
a small glastic dish with food in it