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

Ex Input:
Sentence: 'a safari setting at a zoo with two giraffes and a zebra'. Replace the letter 'n' with 'g' in the sentence.

Ex Output:
a safari settigg at a zoo with two giraffes agd a zebra


Ex Input:
Sentence: 'a group of small children sitting at a table in front of a pizza'. Replace the letter 'r' with 'd' in the sentence.

Ex Output:
a gdoup of small childden sitting at a table in fdont of a pizza


Ex Input:
Sentence: 'a slim desk contains a book a flower and a xbox controller'. Replace the letter 'n' with 'y' in the sentence.

Ex Output:

a slim desk coytaiys a book a flower ayd a xbox coytroller