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

Example Input: Sentence: 'a man that is jumping a skateboard over something'. Replace the letter 'g' with 'j' in the sentence.
Example Output: a man that is jumpinj a skateboard over somethinj

Example Input: Sentence: 'some tracks for a rail way system near a building'. Replace the letter 'a' with 'h' in the sentence.
Example Output: some trhcks for h rhil why system nehr h building

Example Input: Sentence: 'a brown and yellow buss crossing a street in the rain'. Replace the letter 'n' with 'z' in the sentence.
Example Output:
a browz azd yellow buss crossizg a street iz the raiz