a-do aaaa aaad aaap aaav aada aaoo aapa aapo aava adaa adad adao adap adda addd addo adod adoo adp- aopo apao apap apda apdd apo- apod apoo apop appa appd avao avda avdp avva avvo daad daap dada dado dapa dapp dava dddd ddpo doap dod- doda dodd dodo dood doop dopa dopo dopp dpaa dppa dvda dvoa odda oddd odoo odop odva ooaa ooda oooo opap opo- oppa oppo ovda ovo- ovod ovoo ovpp paap pada padd pado papa papp pava pavo pdpa poad pod- poda podd podo pood poop pop- popa popo popp povo ppad ppap ppoa ppod pppa pppd pppo pppp pvda pvpa vaad vada vado vapa vava voad voda vodo vvvv