a-a a-b a-i aaa aab aad aai aao aar aau ab- aba abb abd abi abo abr abu ad- ada adb add adi ado adr adu ai- aia aib aid aii aio air aiu aoa aob aod aoi aoo aor aou ar- ara arb ard ari aro arr aru au- aua aub aud aui auo aur b-u baa bab bad bai bao bar bau bba bbb bbd bbi bbo bbr bbu bda bdb bdd bdi bdo bdr bdu bi- bia bib bid bii bio bir biu boa bob bod boi boo bor bou bra brb brd bri bro brr bru bua bub bud bui buo bur buu daa dab dad dai dao dar dau dba dbb dbd dbi dbo dbr dbu dda ddb ddd ddi ddo ddr ddu di- dia dib did dii dio dir diu doa dob dod doi doo dor dou dra drb drd dri dro drr dru dua dub dud dui duo dur i-d ia- iaa iab iad iai iao iar iau iba ibb ibd ibi ibo ibr ibu ida idb idd idi ido idr idu iia iib iid iii iio iir iiu io- ioa iob iod ioi ioo ior iou ir- ira irb ird iri iro irr iru iu- iua iub iud iui iur o-i oaa oab oad oai oao oar oau ob- oba obb obd obi obo obr obu oda odb odd odi odo odr odu oia oib oid oii oio oir oiu oo- ooa oob ood ooi ooo oor or- ora orb ord ori oro orr oru ou- oua oud oui ouo our ra- raa rab rad rai rao rar rau rba rbb rbd rbi rbo rbr rbu rda rdb rdd rdi rdo rdr rdu ria rib rid rii rio rir roa rob rod roi roo ror rou rra rrb rrd rri rrr rru rua rub rud rui ruo rur ruu ua- uaa uab uad uai uao uar uau uba ubb ubi ubo ubr ubu uda udb udd udi udo udr udu uia uib uid uii uio uir uiu uoa uob uod uoo uor ur- ura urb urd uri uro urr uru uua uur uuu