Password custom pattern - half-know password

Hi all

First post , First Question , sorry ....

I have a few hash to crack in sha256 , and i know the final form of the hash, i'm looking for make a pattern password cracking , its possible with hashcat ?

My password look like :
I = INT 1,9
T= constant letter

[I,I,I,I,I,I,I,I,I][T:I,I][RANDOM STRING 32 CHAR]

(the [] are include in the hash )

If someone can help , i'll be really happy.

Regards.
insideman