Password file or mask attack..

[SmnFz]

Hi guys.. I got an odd request here..

Hi.. im working on a password file (or trying to start an mask attack just to save space), and i need the help to create it

The rules i want..

1234567890ABCDEF (lenght 10 numbers and letters.. All letters =big)

However it wont be an 11TB wordlist, cos i have narrowed it down big time...

maximum 3 letters (random A-F)
Numbers from 7 numbers to 9 (random)
Total 10 numbers and letters in a row

The second part is a bit harder..
There can never bee three letters after each other!

(EXAMPLES) Like this..
000000000A - 999999999A
A000C00000 - A000C00000
F0F000000B - F9F9999999B

Not like this
000FAB0000 - 999FAB9999
FAB0000000 - FAB9999999
0000000FAB - 9999999FAB

Is this possible (or at least the first part?)

Anyone who can help?

thanks in advance