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

Example Input: Sentence: 'a kitchen with a fridge, stove, window, and dining table'. Replace the letter 'd' with 'f' in the sentence.
Example Output: a kitchen with a frifge, stove, winfow, anf fining table

Example Input: Sentence: 'two kids sitting on a  child's bed and smiling'. Replace the letter 't' with 's' in the sentence.
Example Output: swo kids sissing on a  child's bed and smiling

Example Input: Sentence: 'two boys are skiing in snow in front of a mountain'. Replace the letter 'o' with 'm' in the sentence.
Example Output:
twm bmys are skiing in snmw in frmnt mf a mmuntain