Taken from Marcelo Motta:

O.T.O.A∴A∴
I° & II°0° = 0
III°1° = 10 & 2° = 9
IV°3° = 8
4° = 7
VI°5° = 6 Without
VII°5° = 6 Within
VIII°6° = 5
IX°7° = 4
XI°8° = 3

Note: this is not to be taken literally, and may just as well be entirely wrong, as many of Motta’s ideas are.