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

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 bench along a forested hiking path'. Replace the letter 'd' with 'u' in the sentence.

Ex Output:
a bench along a foresteu hiking path


Ex Input:
Sentence: 'a skateboarder performs a maneuver on top of a ramp'. Replace the letter 'o' with 't' in the sentence.

Ex Output:

a skatebtarder perftrms a maneuver tn ttp tf a ramp