Long Passwords (MD5)

Hello guys...
I'm having a simple problem here...

I have 2 constants strings
StrA (size 60) = 0000000000aaaaaaaaaa1111111111bbbbbbbbbb2222222222cccccccccc
StrB (size 10) = aaaaaaaaaa

and i have a variable string only numbers
StrC (size 5): ?????

Let's create a new string using: StrB + StrC + StrA
StrC = 12345
My MD5 hash is: 63b57c99d197823427fabdc4d4b4b4b9

I think hashcat has a limitation about string size.
Someone know a way to use hashcat with mask "?d?d?d?d?d" between 2 long constants strings?
Is it possible?
Thank you