-er a-a a-b a-i aaa aab aae aai aan aao aar aau aav ab- aba abb abe abi abn abo abr abu abv aea aeb aee aei aen aeo aer aeu aev ai- aia aib aie aii ain aio air aiu aiv an- ana anb ane ani ann ano anr anu anv aoa aob aoe aoi aon aoo aor aou aov ar- ara arb are ari arn aro arr aru arv au- aua aub aue aui aun auo aur auv av- ava avb ave avi avn avo avr avu b-u baa bab bae bai ban bao bar bau bav bba bbb bbe bbi bbn bbo bbr bbu be- bea beb bee bei ben beo ber beu bev bi- bia bib bie bii bin bio bir biu biv bna bnb bne bni bnn bno bnr bnu bnv boa bob boe boi bon boo bor bou bov bra brb bre bri brn bro brr bru brv bua bub bue bui bun buo bur buu bva bvb bve bvi bvn bvo bvr bvu bvv eaa eab eae eai ean eao ear eau eav eba ebb ebe ebi ebn ebo ebr ebu ebv eea eeb eee een eeo eer eev eia eib eie eii ein eio eir eiu eiv en- ena enb ene eni enn eno enr enu env eo- eoa eob eoe eoi eon eoo eor eou era erb ere eri ern ero err eru erv eu- eua eub eue eui eun eur euv eva evb eve evi evn evo evr evv i-v ia- iaa iab iae iai ian iao iar iau iav iba ibb ibe ibi ibn ibo ibr ibu ibv ie- iea iee iei ien ier iev iia iib iie iii iin iio iir iiu in- ina inb ine ini inn ino inr inu inv io- ioa iob ioe ioi ion ioo ior iou iov ir- ira irb ire iri irn iro irr iru irv iu- iua iub iue iui iur iva ivb ive ivi ivo ivr ivu ivv n-i naa nab nae nai nan nao nar nau nav nba nbb nbe nbi nbn nbo nbr nbu nbv ne- nea neb nee nei nen neo ner neu nev nia nib nie nii nin nio nir niu niv nna nnb nne nni nnn nno nnu nnv no- noa nob noe noi non noo nor nou nov nra nrb nre nri nrn nro nrr nru nrv nua nub nue nui nun nuo nur nuu nuv nva nvb nve nvi nvn nvu nvv o-i oaa oab oae oai oan oao oar oau oav ob- oba obb obe obi obn obo obr obu obv oea oeb oee oei oen oeo oer oia oib oie oii oin oio oir oiu oiv on- ona onb one oni onn ono onr onu oo- ooa oob ooi oon ooo oor oov or- ora orb ore ori orn oro orr oru orv ou- oua oue oui oun ouo our ov- ova ovb ove ovi ovo ovv ra- raa rab rae rai ran rao rar rau rav rba rbb rbe rbi rbn rbo rbr rbu re- rea reb ree rei ren reo rer reu rev ria rib rie rii rin rio rir riv rna rnb rni rnn rno rnr rnu rnv roa rob roe roi ron roo ror rou rov rra rrb rri rrn rrr rru rua rub rue rui run ruo rur ruu ruv rva rvb rve rvi rvn rvo rvr rvu rvv ua- uaa uab uae uai uan uao uar uau uav uba ubb ube ubi ubn ubo ubr ubu ubv uea ueb uee uei uen uer uia uib uie uii uin uio uir uiu un- una unb une uni unn uno unr unu unv uoa uob uoe uon uoo uor ur- ura urb ure uri urn uro urr uru uua uue uun uur uuu uva uvb uve uvo uvu uvv v-a v-e vaa vab vae vai van vao var vau vav vba vbi vbo vbr vbv vea veb vee vei ven veo ver veu vi- via vib vie vii vin vio vir viu viv vn- vna vni vno vnr vnu vnv voa vob voe voi von voo vor vou vov vra vrb vre vri vrn vrr vru vue vur vuv vva vvb vvi vvo vvr vvv