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

Ex Input:
Sentence: 'a police officer on a horse is riding down the street'. Replace the letter 'h' with 'a' in the sentence.

Ex Output:
a police officer on a aorse is riding down tae street


Ex Input:
Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.

Ex Output:
a bunsh of signs on a pole on the street


Ex Input:
Sentence: 'a group of people in street below traffic lights by buildings'. Replace the letter 'u' with 'd' in the sentence.

Ex Output:

a grodp of people in street below traffic lights by bdildings