-vac a-do aaaa aaac aaad aaav aaca aacc aacd aaco aacv aada aadc aaoo aava acaa acac acad acca accc accd acco acda acdc acoa acod acvv adaa adac adad adao adcc adda addc addd addo adoc adod adoo aoca avao avaz avcc avco avda avva avvo aza- azad azaz azca azo- azoo azov azza azzo c-cd caaa caac cac- caca cacc caco cada cadc cadd cado caod caoz cava cavo caza cazo ccaa ccac ccad ccca cccc cccv ccdc ccoc ccod ccvo cdaa cdac cdad cdda cdvd cdza coad coca coco coda codd cood cova covo cozd cozz cvac cvca cvcc daad daca dada dado dava dazz dcca dccc dccv dcvd dddd ddoc doca doco dod- doda dodd dodo dood doza dozo dvda dvoa dzca dzvv ocac ocad occa occc odac odda oddd odoo odva ooaa ooda oooo ovda ovo- ovod ovoo ozd vaad vaca vaco vada vado vava vaza vdcc voad voca voda vodo vooc vvvv zaav zaca zada zaza zoco zoda zodd zoo- zoza zozo zzzz