inabacao cainiba = 2 above 2; or natolatata.
5.

inibacao cainiba iniateda = 2 above 2-1; or natolatata iniateda = 4-1.
6.

natolatatata inibaca = 4-2.
7.

natolata inibacao-caini = 4-2 above.
8.

natolata-natolata = 4-4.
There is probably no recorded instance of a number system formed on 6, 7, 8, or 9 as a base.