Mr. Azzamer wants to invent a computer password of 8 symbols long with the following properties:

i) each symbol is one of the digits {1, 2, 3, 4, 5, 6, 7, 8, 9}

ii) the first digit of the password is at least 1, the second digit is at least 2, the third digit is at least 3 and so on.

iii) no digit can be used more than once in the same password.