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

Ex Input:
Sentence: 'a black man is smoking a cigarette outside a shop'. Replace the letter 'm' with 'p' in the sentence.

Ex Output:
a black pan is spoking a cigarette outside a shop


Ex Input:
Sentence: 'a man is standing with this luggage next to a railroad track'. Replace the letter 'g' with 'l' in the sentence.

Ex Output:
a man is standinl with this lullale next to a railroad track


Ex Input:
Sentence: 'a man attempts to ski in the few inches of snow left on the ground'. Replace the letter 's' with 'u' in the sentence.

Ex Output:

a man attemptu to uki in the few incheu of unow left on the ground