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

Example Input: Sentence: 'the door of the refrigerator has many magnets and small pictures on it'. Replace the letter 's' with 'z' in the sentence.
Example Output: the door of the refrigerator haz many magnetz and zmall picturez on it

Example Input: Sentence: 'a man in black shirt laying on bed with a teddy bear'. Replace the letter 'd' with 'b' in the sentence.
Example Output: a man in black shirt laying on beb with a tebby bear

Example Input: Sentence: 'two trays of food hold carrots, broccoli, tomatoes, cucumbers, oranges and cranberries'. Replace the letter 'o' with 'i' in the sentence.
Example Output:
twi trays if fiid hild carrits, briccili, timaties, cucumbers, iranges and cranberries