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

Ex Input:
Sentence: 'a boy on the beach playing with a frisbee'. Replace the letter 'h' with 'e' in the sentence.

Ex Output:
a boy on tee beace playing wite a frisbee


Ex Input:
Sentence: 'some tracks for a rail way system near a building'. Replace the letter 'a' with 'h' in the sentence.

Ex Output:
some trhcks for h rhil why system nehr h building


Ex Input:
Sentence: 'a red and silver airplane sitting outside at the airport'. Replace the letter 'h' with 'y' in the sentence.

Ex Output:

a red and silver airplane sitting outside at tye airport