a-a a-b a-i aaa aab aad aai aao aar aas aav ab- aba abb abd abi abo abr abs abv ad- ada adb add adi ado adr ads adv ai- aia aib aid aii aio air ais aiv aoa aob aod aoi aoo aor aos aov ar- ara arb ard ari aro arr ars arv as- asa asb asd asi aso asr ass asv av- ava avb avd avi avo avr avs baa bab bad bai bao bar bas bav bba bbb bbd bbi bbo bbr bbs bda bdb bdd bdi bdo bdr bds bdv bi- bia bib bid bii bio bir bis biv boa bob bod boi boo bor bos bov bra brb brd bri bro brr brs brv bsa bsb bsd bsi bso bsr bss bsv bva bvb bvd bvi bvo bvr bvs bvv daa dab dad dai dao dar das dav dba dbb dbd dbi dbo dbr dbs dbv dda ddb ddd ddi ddo ddr dds di- dia dib did dii dio dir dis div doa dob dod doi doo dor dos dov dra drb drd dri dro drr drs drv dsa dsb dsd dsi dso dsr dss dsv dva dvb dvd dvi dvr dvs i-d i-v ia- iaa iab iad iai iao iar ias iav iba ibb ibd ibi ibo ibr ibs ibv ida idb idd idi ido idr ids idv iia iib iid iii iio iir iis io- ioa iob iod ioi ioo ior ios iov ir- ira irb ird iri iro irr irs irv is- isa isb isd isi iso isr iss isv iva ivb ivd ivi ivo ivr ivs ivv o-i oaa oab oad oai oao oar oas oav ob- oba obb obd obi obo obr obs obv oda odb odd odi odo odr ods odv oia oib oid oii oio oir ois oiv oo- ooa oob ood ooi ooo oor oos oov or- ora orb ord ori oro orr ors orv os- osa osb osd osi oso osr oss osv ov- ova ovb ovd ovi ovo ovs ovv ra- raa rab rad rai rao rar ras rav rba rbb rbd rbi rbo rbr rbs rda rdb rdd rdi rdo rdr rds rdv ria rib rid rii rio rir ris riv roa rob rod roi roo ror ros rov rra rrb rrd rri rrr rrs rsa rsb rsd rsi rso rsr rss rsv rva rvb rvd rvi rvo rvr rvs rvv saa sab sad sai sao sar sas sav sba sbb sbd sbi sbo sbr sbs sbv sda sdb sdd sdi sdo sdr sds sdv sia sib sid sii sio sir sis siv soa sob sod soi soo sor sos sov sr- sra srb srd sri sro srr srs srv ss- ssa ssb ssd ssi sso ssr sss ssv sva svb svd svi svo svr svs svv v-a vaa vab vad vai vao var vas vav vba vbd vbi vbo vbr vbs vbv vdb vdd vdi vdo vdr vds vdv vi- via vib vid vii vio vir vis viv voa vob vod voi voo vor vos vov vra vrb vrd vri vrr vrs vsa vsb vsd vsi vso vsr vss vsv vva vvb vvi vvo vvr vvs vvv