bank[7], bako[7], bano[6], baon[6], bona[6], kano[5], kaon[5], koan[5], kona[5], nako[5], noka[5], okna[5],
bak[6], bok[6], ban[5], abo[5], boa[5], oba[5], bon[5], kan[4], oka[4], nok[4], ano[3], ona[3],
ba[4], bo[4], ka[3], ko[3], ok[3], na[2], no[2], on[2],
