The Sudoku Password
Prof. Sharma is a Science professor who does not like to share his notes with anyone and so keeps them looked in his safe. Since he has to travel out of the city for a few days, he tells his assistant, Irfan, to take care of the safe. One day, the head of the department asks Irfan to show him the professor’s notes for an important research. On Irfan’s request, the petulant professor emails him a Sudoku grid with some alphabets also thrown in. He tells Irfan that the password to his safe is formed by 5 out of the 8 letters in the grid. Irfan is supposed to form the largest possible five-digit number from these eight letters. The word formed by using the letters in the sequence corresponding to this largest number gives the password to this safe.
From the original Sudoku received by Irfan, can he retrieve the password for the safe?