-th a-a a-b a-i a-t aaa aab aah aai aao aar aat aax ab- aba abb abh abi abo abr abt abx aha ahb ahh ahi aho ahr aht ahx ai- aia aib aih aii aio air ait aix aoa aob aoh aoi aoo aor aot aox ar- ara arb arh ari aro arr art arx at- ata atb ath ati ato atr att atx ax- axa axh axi axo axr axt axx baa bab bah bai bao bar bat bax bba bbb bbh bbi bbo bbr bbt bbx bha bhb bhh bhi bho bhr bht bhx bi- bia bib bih bii bio bir bit bix boa bob boh boi boo bor bot box bra brb brh bri bro brr brt brx bta btb bth bti bto btr btt btx bxb bxi bxo bxx h-i haa hab hah hai hao har hat hax hba hbb hbh hbi hbo hbr hbt hbx hha hhb hhh hhi hho hhr hht hia hib hih hii hio hir hit hix hoa hob hoh hoi hoo hor hot hox hr- hra hrb hrh hri hro hrr hrt hta htb hth hti hto htr htt htx ia- iaa iab iah iai iao iar iat iba ibb ibh ibi ibo ibr ibt ibx iha ihb ihh ihi iho ihr iht iia iib iih iii iio iir iit iix io- ioa iob ioh ioi ioo ior iot ir- ira irb iri iro irr irt irx ita itb ith iti ito itt itx ixi o-i oaa oab oah oai oao oar oat oax ob- oba obb obh obi obo obr obt obx oha ohh ohi oho ohr oht oia oib oii oio oir oit oo- ooa oob ooh ooi ooo oor oot oox or- ora orb orh ori oro orr ort orx ot- ota otb oth oti oto otr ott ox- oxa oxb oxi oxo oxt oxx ra- raa rab rah rai rao rar rat rax rba rbb rbh rbi rbo rbr rbt rbx rh- rha rhb rhh rhi rho rhr rht ria rib rih rii rio rir rit rix roa rob roh roi roo ror rot rox rra rrb rrh rri rrr rrt rta rtb rti rto rtr rtt rtx rxr t-x taa tab tah tai tao tar tat tax tba tbb tbh tbi tbo tbr tbt th- tha thb thh thi tho thr tht thx tia tib tih tii tio tir tit tix to- toa tob toh toi too tor tot tox tra trb trh tri tro trr trt trx tta ttb tth tti tto ttr ttt ttx txi txt xaa xar xat xbr xbx xht xia xii xio xit xix xoa xoi xoo xor xot xox xrt xrx xti xtr xtx xxi xxo xxx