  We present sum-sides for principal characters of all standard (i.e.,
integrable and highest-weight) irreducible modules for the affine Lie algebra
$A_2^{(2)}$. We use modifications of five known Bailey pairs; three of these
are sufficient to obtain all the necessary principal characters. We then use
the technique of Bailey lattice appropriately extended to include
"out-of-bounds" values of one of the parameters, namely, $i$. We demonstrate
how the sum-sides break into six families depending on the level of the modules
modulo 6, confirming a conjecture of McLaughlin--Sills.
