28. Vasya, Petya, and Grisha are inseparable friends. Their last names are Lepeshkin, Vatrushkin, and Bublikov. One day, Vasya and Grisha went to Petya's house. "Let's solve chess problems," Vasya suggested. Just as the friends set up the pieces, there was a knock at the door and the postman came in. "A letter for Vatrushkin!" he said. We also know that Lepeshkin, while solving a chess problem, suggested sacrificing a rook, which Vasya disagreed with, almost leading to an argument between them. But Petya managed to reconcile the friends. Name the last names of Vasya, Petya, and Grisha.
28. Vasya's last name is Bublikov, Petya's is Vatrushkin, and Grisha's is Lepeshkin.