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

Example Input: Sentence: 'a man on a skateboard jumping down a short flight of stairs'. Replace the letter 'o' with 'j' in the sentence.
Example Output: a man jn a skatebjard jumping djwn a shjrt flight jf stairs

Example Input: Sentence: 'an image of a nicely decorated hotel room with luggage sitting on a bench'. Replace the letter 'c' with 'j' in the sentence.
Example Output: an image of a nijely dejorated hotel room with luggage sitting on a benjh

Example Input: Sentence: 'a group of people riding on top of snow boarding equipment'. Replace the letter 'e' with 'x' in the sentence.
Example Output:
a group of pxoplx riding on top of snow boarding xquipmxnt