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

Ex Input:
Sentence: 'a sign sitting on the side of a snow covered slope'. Replace the letter 'e' with 'g' in the sentence.

Ex Output:
a sign sitting on thg sidg of a snow covgrgd slopg


Ex Input:
Sentence: 'a bathroom with a tub connected to a pool with some sinks inside'. Replace the letter 'e' with 'b' in the sentence.

Ex Output:
a bathroom with a tub connbctbd to a pool with somb sinks insidb


Ex Input:
Sentence: 'a white plate holding a piece of cake and frosting'. Replace the letter 'i' with 'c' in the sentence.

Ex Output:

a whcte plate holdcng a pcece of cake and frostcng