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 bed with white comforter and two black stiletto heels'. Replace the letter 'h' with 's' in the sentence.
Example Output: a bed wits wsite comforter and two black stiletto seels

Example Input: Sentence: 'a living room with a fireplace and chandelier'. Replace the letter 'i' with 'v' in the sentence.
Example Output:
a lvvvng room wvth a fvreplace and chandelver