a-a a-b a-i aaa aab aad aai aao aar aau aav ab- aba abb abd abi abo abr abu abv ad- ada adb add adi ado adr adu adv ai- aia aib aid aii aio air aiu aiv aoa aob aod aoi aoo aor aou aov ar- ara arb ard ari aro arr aru arv au- aua aub aud aui auo aur auv av- ava avb avd avi avo avr avu b-u baa bab bad bai bao bar bau bav bba bbb bbd bbi bbo bbr bbu bda bdb bdd bdi bdo bdr bdu bdv bi- bia bib bid bii bio bir biu biv boa bob bod boi boo bor bou bov bra brb brd bri bro brr bru brv bua bub bud bui buo bur buu bva bvb bvd bvi bvo bvr bvu bvv daa dab dad dai dao dar dau dav dba dbb dbd dbi dbo dbr dbu dbv dda ddb ddd ddi ddo ddr ddu di- dia dib did dii dio dir diu div doa dob dod doi doo dor dou dov dra drb drd dri dro drr dru drv dua dub dud dui duo dur duv dva dvb dvd dvi dvr dvu i-d i-v ia- iaa iab iad iai iao iar iau iav iba ibb ibd ibi ibo ibr ibu ibv ida idb idd idi ido idr idu idv iia iib iid iii iio iir iiu io- ioa iob iod ioi ioo ior iou iov ir- ira irb ird iri iro irr iru irv iu- iua iub iud iui iur iva ivb ivd ivi ivo ivr ivu ivv o-i oaa oab oad oai oao oar oau oav ob- oba obb obd obi obo obr obu obv oda odb odd odi odo odr odu odv oia oib oid oii oio oir oiu oiv oo- ooa oob ood ooi ooo oor oov or- ora orb ord ori oro orr oru orv ou- oua oud oui ouo our ov- ova ovb ovd ovi ovo ovv ra- raa rab rad rai rao rar rau rav rba rbb rbd rbi rbo rbr rbu rda rdb rdd rdi rdo rdr rdu rdv ria rib rid rii rio rir riv roa rob rod roi roo ror rou rov rra rrb rrd rri rrr rru rua rub rud rui ruo rur ruu ruv rva rvb rvd rvi rvo rvr rvu rvv ua- uaa uab uad uai uao uar uau uav uba ubb ubi ubo ubr ubu ubv uda udb udd udi udo udr udu udv uia uib uid uii uio uir uiu uoa uob uod uoo uor ur- ura urb urd uri uro urr uru uua uur uuu uva uvb uvo uvu uvv v-a vaa vab vad vai vao var vau vav vba vbd vbi vbo vbr vbv vdb vdd vdi vdo vdr vdu vdv vi- via vib vid vii vio vir viu viv voa vob vod voi voo vor vou vov vra vrb vrd vri vrr vru vur vuv vva vvb vvi vvo vvr vvv