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

Example Input: Sentence: 'a man extends his arm with a frisbee in hand as another reaches to grab it while teammates watch'. Replace the letter 'a' with 'g' in the sentence.
Example Output: g mgn extends his grm with g frisbee in hgnd gs gnother regches to grgb it while tegmmgtes wgtch

Example Input: Sentence: 'one wall in the room is flanked by a lovely piece of furniture which displays several object d'art'. Replace the letter 'n' with 'z' in the sentence.
Example Output: oze wall iz the room is flazked by a lovely piece of furziture which displays several object d'art

Example Input: Sentence: 'a book of the birds of australia and a stuffed banana in pajamas doll'. Replace the letter 's' with 'p' in the sentence.
Example Output:
a book of the birdp of auptralia and a ptuffed banana in pajamap doll