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

Ex Input:
Sentence: 'a long green grain traveling past a white building'. Replace the letter 'w' with 'o' in the sentence.

Ex Output:
a long green grain traveling past a ohite building


Ex Input:
Sentence: 'a large elephant standing outside beside a tree'. Replace the letter 'e' with 'y' in the sentence.

Ex Output:
a largy ylyphant standing outsidy bysidy a tryy


Ex Input:
Sentence: 'a school bus stopped outside a running room gym'. Replace the letter 'm' with 'c' in the sentence.

Ex Output:

a school bus stopped outside a running rooc gyc