a-a a-b a-i aaa aab aai aao aau aav ab- aba abb abi abo abu abv ai- aia aib aii aio aiu aiv aoa aob aoi aoo aou aov au- aua aub aui auo auv av- ava avb avi avo avu b-u baa bab bai bao bau bav bba bbb bbi bbo bbu bi- bia bib bii bio biu biv boa bob boi boo bou bov bua bub bui buo buu bva bvb bvi bvo bvu bvv i-v ia- iaa iab iai iao iau iav iba ibb ibi ibo ibu ibv iia iib iii iio iiu io- ioa iob ioi ioo iou iov iu- iua iub iui iva ivb ivi ivo ivu ivv o-i oaa oab oai oao oau oav ob- oba obb obi obo obu obv oia oib oii oio oiu oiv oo- ooa oob ooi ooo oov ou- oua oui ouo ov- ova ovb ovi ovo ovv ua- uaa uab uai uao uau uav uba ubb ubi ubo ubu ubv uia uib uii uio uiu uoa uob uoo uua uuu uva uvb uvo uvu uvv v-a vaa vab vai vao vau vav vba vbi vbo vbv vi- via vib vii vio viu viv voa vob voi voo vou vov vuv vva vvb vvi vvo vvv