-er a-a a-b a-i aaa aab aae aah aai aak aao aar aav ab- aba abb abe abh abi abk abo abr abv aea aeb aee aeh aei aek aeo aer aev aha ahb ahe ahh ahi ahk aho ahr ahv ai- aia aib aie aih aii aik aio air aiv aka akb ake akh aki akk ako akr akv aoa aob aoe aoh aoi aok aoo aor aov ar- ara arb are arh ari ark aro arr arv av- ava avb ave avh avi avk avo avr baa bab bae bah bai bak bao bar bav bba bbb bbe bbh bbi bbk bbo bbr be- bea beb bee beh bei bek beo ber bev bha bhb bhe bhh bhi bhk bho bhr bhv bi- bia bib bie bih bii bik bio bir biv bka bkb bke bkk bko bkr bkv boa bob boe boh boi bok boo bor bov bra brb bre brh bri brk bro brr brv bva bvb bve bvh bvi bvk bvo bvr bvv eaa eab eae eah eai eak eao ear eav eba ebb ebe ebh ebi ebk ebo ebr ebv eea eeb eee eek eeo eer eev eha ehb ehe ehh ehi eho ehr ehv eia eib eie eii eik eio eir eiv eka ekb eke ekh eki eko ekr ekv eo- eoa eob eoe eoh eoi eok eoo eor era erb ere erh eri erk ero err erv eva evb eve evh evi evo evr evv h-i haa hab hae hah hai hak hao har hav hba hbb hbe hbh hbi hbk hbo hbr hbv he- hea heb hee heh hei hek heo her hev hha hhb hhe hhh hhi hhk hho hhr hhv hia hib hie hih hii hik hio hir hiv hka hkb hkh hki hkk hko hkr hoa hob hoe hoh hoi hok hoo hor hov hr- hra hrb hre hrh hri hrk hro hrr hrv hv- hva hvb hvk hvo hvr hvv i-v ia- iaa iab iae iah iai iao iar iav iba ibb ibe ibh ibi ibk ibo ibr ibv ie- iea iee iei iek ier iev iha ihb ihe ihh ihi ihk iho ihr ihv iia iib iie iih iii iio iir ika ikb ike iki ikk iko ikr ikv io- ioa iob ioe ioh ioi ioo ior iov ir- ira irb ire iri irk iro irr irv iva ivb ive ivi ivo ivr ivv ka- kaa kab kae kah kai kak kao kar kav kba kbb kbe kbh kbi kbk kbo kbr ke- kea keb kee keh kei kek keo ker kev kha khe khh khi khk kho khr khv kia kib kie kih kii kik kio kir kiv kkb kke kkh kki kkk kkr kkv koa kob koe koh koi kok koo kor kra kri krk kro krr krv kva kvb kvh kvi kvk kvo kvr kvv o-i oaa oab oae oah oai oak oao oar oav ob- oba obb obe obh obi obk obo obr obv oea oeb oee oeh oei oeo oer oha ohe ohh ohi oho ohr oia oib oie oii oik oio oir oiv oka okb oke oki okk oko okr oo- ooa oob ooh ooi ook ooo oor oov or- ora orb ore orh ori ork oro orr orv ov- ova ovb ove ovh ovi ovo ovv ra- raa rab rae rah rai rak rao rar rav rba rbb rbe rbh rbi rbk rbo rbr re- rea reb ree reh rei rek reo rer rev rh- rha rhb rhe rhh rhi rho rhr rhv ria rib rie rih rii rik rio rir riv rkb rke rkk rko rkv roa rob roe roh roi rok roo ror rov rra rrb rrh rri rrk rrr rva rvb rve rvh rvi rvo rvr rvv v-a v-e vaa vab vae vah vai vak vao var vav vba vbh vbi vbk vbo vbr vbv vea veb vee veh vei vek veo ver vh- vha vhb vhe vhi vho vi- via vib vie vii vik vio vir viv vka vkb voa vob voe voh voi vok voo vor vov vra vrb vre vrh vri vrk vrr vva vvb vvi vvo vvr vvv