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

Ex Input:
Sentence: 'a person is riding a skateboard in a skateboard park'. Replace the letter 'a' with 'o' in the sentence.

Ex Output:
o person is riding o skoteboord in o skoteboord pork


Ex Input:
Sentence: 'a child taking the paper off a box sitting on the floor'. Replace the letter 'c' with 'b' in the sentence.

Ex Output:
a bhild taking the paper off a box sitting on the floor


Ex Input:
Sentence: 'a cat is watching a computer with a video of a cat'. Replace the letter 't' with 'a' in the sentence.

Ex Output:

a caa is waaching a compuaer wiah a video of a caa