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

Ex Input:
Sentence: 'two kids sitting on a child's bed and smiling'. Replace the letter 't' with 's' in the sentence.

Ex Output:
swo kids sissing on a child's bed and smiling

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 close up of a pair of headphones near a keyboard on a desk'. Replace the letter 'l' with 'd' in the sentence.

Ex Output:
a cdose up of a pair of headphones near a keyboard on a desk