frat/srat ranks

frats (no order in tiers)

snu / ka / phi gam / phi delt

beta / ato / pike / theta chi / sae

pi kap / dke / delta chi / sig ep

phi psi / sig chi / lambda chi / dtd

kappa sig / sig tau / sig pi / akl

srats (no order in tiers)

axo / xo / ddd / kkg

agd / kd / phi mu

zeta / pi phi / adpi

aphi / dz / aoii / gphi / dg

theta / sk