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

Ex Input:
Sentence: 'a black cat is sniffing a glass bottle'. Replace the letter 'c' with 'f' in the sentence.

Ex Output:
a blafk fat is sniffing a glass bottle


Ex Input:
Sentence: 'an old photo of group of people nicely dressed around the end of a long table'. Replace the letter 'e' with 'i' in the sentence.

Ex Output:
an old photo of group of piopli nicily drissid around thi ind of a long tabli


Ex Input:
Sentence: 'a man on skies is standing in the snow'. Replace the letter 'e' with 'n' in the sentence.

Ex Output:

a man on skins is standing in thn snow