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

Ex Input:
Sentence: 'a bus all lite up inside and out with diffrent colors '. Replace the letter 'r' with 'w' in the sentence.

Ex Output:
a bus all lite up inside and out with diffwent colows 


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


Ex Input:
Sentence: 'a bird perched in a green leaf filled tree'. Replace the letter 'a' with 'b' in the sentence.

Ex Output:

b bird perched in b green lebf filled tree