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

Ex Input:
Sentence: 'a person and a dog are on a bench'. Replace the letter 'e' with 'r' in the sentence.

Ex Output:
a prrson and a dog arr on a brnch

Ex Input:
Sentence: 'a person jumping up in the air on a snowboard'. Replace the letter 'r' with 'o' in the sentence.

Ex Output:
a peoson jumping up in the aio on a snowboaod

Ex Input:
Sentence: 'a toaster oven on a counter is open with a tray of muffins in it, with two muffins on plates to the side'. Replace the letter 'o' with 'h' in the sentence.

Ex Output:
a thaster hven hn a chunter is hpen with a tray hf muffins in it, with twh muffins hn plates th the side