-th a-a a-b a-i a-t aaa aab aah aai aao aar aas aat aax ab- aba abb abh abi abo abr abs abt abx aha ahb ahh ahi aho ahr ahs aht ahx ai- aia aib aih aii aio air ais ait aix aoa aob aoh aoi aoo aor aos aot aox ar- ara arb arh ari aro arr ars art arx as- asa asb ash asi aso asr ass ast asx at- ata atb ath ati ato atr ats att atx ax- axa axh axi axo axr axs axt axx baa bab bah bai bao bar bas bat bax bba bbb bbh bbi bbo bbr bbs bbt bbx bha bhb bhh bhi bho bhr bhs bht bhx bi- bia bib bih bii bio bir bis bit bix boa bob boh boi boo bor bos bot box bra brb brh bri bro brr brs brt brx bsa bsb bsh bsi bso bsr bss bst bsx bta btb bth bti bto btr bts btt btx bxb bxi bxo bxx h-i haa hab hah hai hao har has hat hax hba hbb hbh hbi hbo hbr hbs hbt hbx hha hhb hhh hhi hho hhr hhs hht hia hib hih hii hio hir his hit hix hoa hob hoh hoi hoo hor hos hot hox hr- hra hrb hrh hri hro hrr hrs hrt hsa hsb hsh hsi hsr hss hst hsx hta htb hth hti hto htr hts htt htx ia- iaa iab iah iai iao iar ias iat iba ibb ibh ibi ibo ibr ibs ibt ibx iha ihb ihh ihi iho ihr ihs iht iia iib iih iii iio iir iis iit iix io- ioa iob ioh ioi ioo ior ios iot ir- ira irb iri iro irr irs irt irx is- isa isb ish isi iso isr iss ist ita itb ith iti ito its itt itx ixi o-i oaa oab oah oai oao oar oas oat oax ob- oba obb obh obi obo obr obs obt obx oha ohh ohi oho ohr ohs oht oia oib oii oio oir ois oit oo- ooa oob ooh ooi ooo oor oos oot oox or- ora orb orh ori oro orr ors ort orx os- osa osb osh osi oso osr oss ost osx ot- ota otb oth oti oto otr ots ott ox- oxa oxb oxi oxo oxt oxx ra- raa rab rah rai rao rar ras rat rax rba rbb rbh rbi rbo rbr rbs rbt rbx rh- rha rhb rhh rhi rho rhr rhs rht ria rib rih rii rio rir ris rit rix roa rob roh roi roo ror ros rot rox rra rrb rrh rri rrr rrs rrt rsa rsb rsh rsi rso rsr rss rst rsx rta rtb rti rto rtr rts rtt rtx rxr rxs saa sab sah sai sao sar sas sat sax sba sbb sbh sbi sbo sbr sbs sbt sbx sh- sha shb shh shi sho shr shs sht sia sib sih sii sio sir sis sit six soa sob soh soi soo sor sos sot sox sr- sra srb srh sri sro srr srs srt srx ss- ssa ssb ssh ssi sso ssr sss sst ssx sta stb sth sti sto str sts stt stx sxi sxs sxt t-x taa tab tah tai tao tar tas tat tax tba tbb tbh tbi tbo tbr tbs tbt th- tha thb thh thi tho thr ths tht thx tia tib tih tii tio tir tis tit tix to- toa tob toh toi too tor tos tot tox tra trb trh tri tro trr trs trt trx tsa tsb tsh tsi tso tsr tss tst tsx tta ttb tth tti tto ttr tts ttt ttx txi txs txt xaa xar xas xat xbr xbx xht xia xii xio xis xit xix xoa xoi xoo xor xos xot xox xrt xrx xsa xsb xsi xss xst xti xtr xts xtx xxi xxo xxx