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

Example Input: Sentence: 'two giraffe standing in an enclosure at the zoo next to a  tree'. Replace the letter 'n' with 'g' in the sentence.
Example Output: two giraffe stagdigg ig ag egclosure at the zoo gext to a  tree

Example Input: Sentence: 'a dog laying in front of a horses stall with the horse peeking over the half door'. Replace the letter 'a' with 'b' in the sentence.
Example Output: b dog lbying in front of b horses stbll with the horse peeking over the hblf door

Example Input: Sentence: 'a view of a bathroom with a multicolored curtain'. Replace the letter 'n' with 'j' in the sentence.
Example Output:
a view of a bathroom with a multicolored curtaij