-er a-a a-b a-i aaa aab aad aae aai aao aar aau aav ab- aba abb abd abe abi abo abr abu abv ad- ada adb add ade adi ado adr adu adv aea aeb aed aee aei aeo aer aeu aev ai- aia aib aid aie aii aio air aiu aiv aoa aob aod aoe aoi aoo aor aou aov ar- ara arb ard are ari aro arr aru arv au- aua aub aud aue aui auo aur auv av- ava avb avd ave avi avo avr avu b-u baa bab bad bae bai bao bar bau bav bba bbb bbd bbe bbi bbo bbr bbu bda bdb bdd bde bdi bdo bdr bdu bdv be- bea beb bed bee bei beo ber beu bev bi- bia bib bid bie bii bio bir biu biv boa bob bod boe boi boo bor bou bov bra brb brd bre bri bro brr bru brv bua bub bud bue bui buo bur buu bva bvb bvd bve bvi bvo bvr bvu bvv daa dab dad dae dai dao dar dau dav dba dbb dbd dbe dbi dbo dbr dbu dbv dda ddb ddd dde ddi ddo ddr ddu de- dea deb ded dee dei deo der deu dev di- dia dib did die dii dio dir diu div doa dob dod doe doi doo dor dou dov dra drb drd dre dri dro drr dru drv dua dub dud due dui duo dur duv dva dvb dvd dve dvi dvr dvu eaa eab ead eae eai eao ear eau eav eba ebb ebd ebe ebi ebo ebr ebu ebv ed- eda edb edd ede edi edo edr edu eea eeb eed eee eeo eer eev eia eib eid eie eii eio eir eiu eiv eo- eoa eob eod eoe eoi eoo eor eou era erb erd ere eri ero err eru erv eu- eua eub eud eue eui eur euv eva evb evd eve evi evo evr evv i-d i-v ia- iaa iab iad iae iai iao iar iau iav iba ibb ibd ibe ibi ibo ibr ibu ibv ida idb idd ide idi ido idr idu idv ie- iea ied iee iei ier iev iia iib iid iie iii iio iir iiu io- ioa iob iod ioe ioi ioo ior iou iov ir- ira irb ird ire iri iro irr iru irv iu- iua iub iud iue iui iur iva ivb ivd ive ivi ivo ivr ivu ivv o-i oaa oab oad oae oai oao oar oau oav ob- oba obb obd obe obi obo obr obu obv oda odb odd ode odi odo odr odu odv oea oeb oed oee oei oeo oer oia oib oid oie oii oio oir oiu oiv oo- ooa oob ood ooi ooo oor oov or- ora orb ord ore ori oro orr oru orv ou- oua oud oue oui ouo our ov- ova ovb ovd ove ovi ovo ovv ra- raa rab rad rae rai rao rar rau rav rba rbb rbd rbe rbi rbo rbr rbu rda rdb rdd rde rdi rdo rdr rdu rdv re- rea reb red ree rei reo rer reu rev ria rib rid rie rii rio rir riv roa rob rod roe roi roo ror rou rov rra rrb rrd rri rrr rru rua rub rud rue rui ruo rur ruu ruv rva rvb rvd rve rvi rvo rvr rvu rvv ua- uaa uab uad uae uai uao uar uau uav uba ubb ube ubi ubo ubr ubu ubv uda udb udd ude udi udo udr udu udv uea ueb ued uee uei uer uia uib uid uie uii uio uir uiu uoa uob uod uoe uoo uor ur- ura urb urd ure uri uro urr uru uua uue uur uuu uva uvb uve uvo uvu uvv v-a v-e vaa vab vad vae vai vao var vau vav vba vbd vbi vbo vbr vbv vdb vdd vde vdi vdo vdr vdu vdv vea veb ved vee vei veo ver veu vi- via vib vid vie vii vio vir viu viv voa vob vod voe voi voo vor vou vov vra vrb vrd vre vri vrr vru vue vur vuv vva vvb vvi vvo vvr vvv