a-a a-b a-i aaa aab aad aai aan aao aar aau ab- aba abb abd abi abn abo abr abu ad- ada adb add adi adn ado adr adu ai- aia aib aid aii ain aio air aiu an- ana anb and ani ann ano anr anu aoa aob aod aoi aon aoo aor aou ar- ara arb ard ari arn aro arr aru au- aua aub aud aui aun auo aur b-u baa bab bad bai ban bao bar bau bba bbb bbd bbi bbn bbo bbr bbu bda bdb bdd bdi bdo bdr bdu bi- bia bib bid bii bin bio bir biu bna bnb bnd bni bnn bno bnr bnu boa bob bod boi bon boo bor bou bra brb brd bri brn bro brr bru bua bub bud bui bun buo bur buu daa dab dad dai dan dao dar dau dba dbb dbd dbi dbn dbo dbr dbu dda ddb ddd ddi ddn ddo ddr ddu di- dia dib did dii din dio dir diu dna dnb dnd dni dnn dno dnr doa dob dod doi don doo dor dou dra drb drd dri drn dro drr dru dua dub dud dui dun duo dur i-d ia- iaa iab iad iai ian iao iar iau iba ibb ibd ibi ibn ibo ibr ibu ida idb idd idi idn ido idr idu iia iib iid iii iin iio iir iiu in- ina inb ind ini inn ino inr inu io- ioa iob iod ioi ion ioo ior iou ir- ira irb ird iri irn iro irr iru iu- iua iub iud iui iur n-i naa nab nad nai nan nao nar nau nba nbb nbd nbi nbn nbo nbr nbu nda ndb ndd ndi ndn ndo ndr ndu nia nib nid nii nin nio nir niu nna nnb nni nnn nno nnu no- noa nob nod noi non noo nor nou nra nrb nrd nri nrn nro nrr nru nua nub nud nui nun nuo nur nuu o-i oaa oab oad oai oan oao oar oau ob- oba obb obd obi obn obo obr obu oda odb odd odi odn odo odr odu oia oib oid oii oin oio oir oiu on- ona onb ond oni onn ono onr onu oo- ooa oob ood ooi oon ooo oor or- ora orb ord ori orn oro orr oru ou- oua oud oui oun ouo our ra- raa rab rad rai ran rao rar rau rba rbb rbd rbi rbn rbo rbr rbu rda rdb rdd rdi rdn rdo rdr rdu ria rib rid rii rin rio rir rna rnb rnd rni rnn rno rnr rnu roa rob rod roi ron roo ror rou rra rrb rrd rri rrn rrr rru rua rub rud rui run ruo rur ruu ua- uaa uab uad uai uan uao uar uau uba ubb ubi ubn ubo ubr ubu uda udb udd udi udn udo udr udu uia uib uid uii uin uio uir uiu un- una unb und uni unn uno unr unu uoa uob uod uon uoo uor ur- ura urb urd uri urn uro urr uru uua uun uur uuu