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

Ex Input:
Sentence: 'a bathroom that has  a sink and a toilet'. Replace the letter 's' with 'a' in the sentence.

Ex Output:
a bathroom that haa  a aink and a toilet


Ex Input:
Sentence: 'vita mix blender with something in it already blended'. Replace the letter 'b' with 'a' in the sentence.

Ex Output:
vita mix alender with something in it already alended


Ex Input:
Sentence: 'a pizza on a wooden surface on a table'. Replace the letter 't' with 'i' in the sentence.

Ex Output:

a pizza on a wooden surface on a iable