a-a a-b a-i a-t aaa aab aai aao aar aas aat aav aax ab- aba abb abi abo abr abs abt abv abx ai- aia aib aii aio air ais ait aiv aix aoa aob aoi aoo aor aos aot aov aox ar- ara arb ari aro arr ars art arv arx as- asa asb asi aso asr ass ast asv asx at- ata atb ati ato atr ats att atv atx av- ava avb avi avo avr avs avt avx ax- axa axi axo axr axs axt axv axx baa bab bai bao bar bas bat bav bax bba bbb bbi bbo bbr bbs bbt bbx bi- bia bib bii bio bir bis bit biv bix boa bob boi boo bor bos bot bov box bra brb bri bro brr brs brt brv brx bsa bsb bsi bso bsr bss bst bsv bsx bta btb bti bto btr bts btt btv btx bva bvb bvi bvo bvr bvs bvt bvv bxb bxi bxo bxx i-v ia- iaa iab iai iao iar ias iat iav iba ibb ibi ibo ibr ibs ibt ibv ibx iia iib iii iio iir iis iit iix io- ioa iob ioi ioo ior ios iot iov ir- ira irb iri iro irr irs irt irv irx is- isa isb isi iso isr iss ist isv ita itb iti ito its itt itv itx iva ivb ivi ivo ivr ivs ivt ivv ivx ixi o-i oaa oab oai oao oar oas oat oav oax ob- oba obb obi obo obr obs obt obv obx oia oib oii oio oir ois oit oiv oo- ooa oob ooi ooo oor oos oot oov oox or- ora orb ori oro orr ors ort orv orx os- osa osb osi oso osr oss ost osv osx ot- ota otb oti oto otr ots ott otv ov- ova ovb ovi ovo ovs ovv ox- oxa oxb oxi oxo oxt oxx ra- raa rab rai rao rar ras rat rav rax rba rbb rbi rbo rbr rbs rbt rbx ria rib rii rio rir ris rit riv rix roa rob roi roo ror ros rot rov rox rra rrb rri rrr rrs rrt rsa rsb rsi rso rsr rss rst rsv rsx rta rtb rti rto rtr rts rtt rtv rtx rva rvb rvi rvo rvr rvs rvt rvv rxr rxs saa sab sai sao sar sas sat sav sax sba sbb sbi sbo sbr sbs sbt sbv sbx sia sib sii sio sir sis sit siv six soa sob soi soo sor sos sot sov sox sr- sra srb sri sro srr srs srt srv srx ss- ssa ssb ssi sso ssr sss sst ssv ssx sta stb sti sto str sts stt stv stx sva svb svi svo svr svs svt svv svx sxi sxs sxt t-x taa tab tai tao tar tas tat tav tax tba tbb tbi tbo tbr tbs tbt tbv tia tib tii tio tir tis tit tiv tix to- toa tob toi too tor tos tot tov tox tra trb tri tro trr trs trt trv trx tsa tsb tsi tso tsr tss tst tsv tsx tta ttb tti tto ttr tts ttt ttv ttx tva tvb tvi tvo tvr tvs tvt tvx txi txs txt v-a vaa vab vai vao var vas vat vav vax vba vbi vbo vbr vbs vbv vi- via vib vii vio vir vis vit viv vix voa vob voi voo vor vos vot vov vox vra vrb vri vrr vrs vrt vsa vsb vsi vso vsr vss vst vsv vta vtb vti vto vtr vts vtt vtv vtx vva vvb vvi vvo vvr vvs vvt vvv vxa vxr vxs vxv xaa xar xas xat xav xbr xbx xia xii xio xis xit xiv xix xoa xoi xoo xor xos xot xov xox xrt xrx xsa xsb xsi xss xst xti xtr xts xtv xtx xvi xvt xxi xxo xxv xxx