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

Sentence: 'a baseball player running to third base from second'. Replace the letter 'a' with 'u' in the sentence.
u busebull pluyer running to third buse from second

Sentence: 'a sign sitting on the side of a snow covered slope'. Replace the letter 'e' with 'g' in the sentence.
a sign sitting on thg sidg of a snow covgrgd slopg

Sentence: 'a black cat sniffing a glass of wine'. Replace the letter 'a' with 'k' in the sentence.

k blkck ckt sniffing k glkss of wine