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

Ex Input:
Sentence: 'a man on the news, watched on the television'. Replace the letter 'o' with 'z' in the sentence.

Ex Output:
a man zn the news, watched zn the televisizn

Ex Input:
Sentence: 'a couple of giraffe standing next to each other'. Replace the letter 'i' with 'q' in the sentence.

Ex Output:
a couple of gqraffe standqng next to each other

Ex Input:
Sentence: 'a family gathered in the kitchen watching a man play video game'. Replace the letter 'h' with 'v' in the sentence.

Ex Output:
a family gatvered in tve kitcven watcving a man play video game