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

Ex Input:
Sentence: 'bags of apples on display at the market'. Replace the letter 'y' with 'p' in the sentence.

Ex Output:
bags of apples on displap at the market


Ex Input:
Sentence: 'a couple walking down a sidewalk next to some graffiti'. Replace the letter 'a' with 'y' in the sentence.

Ex Output:
y couple wylking down y sidewylk next to some gryffiti


Ex Input:
Sentence: 'a small personal sized pizza is shown on display'. Replace the letter 'e' with 'c' in the sentence.

Ex Output:

a small pcrsonal sizcd pizza is shown on display