a-a aaa aad aan aao aav ad- ada add adn ado adv an- ana and ann ano anv aoa aod aon aoo aov av- ava avd avn avo daa dad dan dao dav dda ddd ddn ddo dna dnd dnn dno doa dod don doo dov dva dvd dvn naa nad nan nao nav nda ndd ndn ndo ndv nna nnn nno nnv no- noa nod non noo nov nva nvd nvn nvv oaa oad oan oao oav oda odd odn odo odv on- ona ond onn ono oo- ooa ood oon ooo oov ov- ova ovd ovo ovv v-a vaa vad van vao vav vdd vdo vdv vn- vna vnd vno vnv voa vod von voo vov vva vvo vvv