a-a a-b a-i a-t aaa aab aae aai aan aao aap aas aat ab- aba abb abe abi abn abo abp abs abt aea aeb aee aei aen aeo aep aes aet ai- aia aib aie aii ain aio aip ais ait an- ana anb ane ani ann ano anp ans ant aoa aob aoe aoi aon aoo aop aos aot ap- apa apb ape api apn apo app aps apt as- asa asb ase asi asn aso asp ass ast at- ata atb ate ati atn ato atp ats att b-p baa bab bae bai ban bao bap bas bat bba bbb bbe bbi bbn bbo bbp bbs bbt be- bea beb bee bei ben beo bep bes bet bi- bia bib bie bii bin bio bip bis bit bna bnb bne bni bnn bno bnp bns bnt boa bob boe boi bon boo bop bos bot bpa bpb bpe bpi bpn bpo bpp bps bpt bsa bsb bse bsi bsn bso bsp bss bst bta btb bte bti btn bto btp bts btt eaa eab eae eai ean eao eap eas eat eba ebb ebe ebi ebn ebo ebp ebs ebt eea eeb eee een eeo eep ees eet eia eib eie eii ein eio eip eis eit en- ena enb ene eni enn eno enp ens ent eo- eoa eob eoe eoi eon eoo eop eos eot ep- epa epb epe epi epn epo epp eps ept es- esa esb ese esi esn eso esp ess est eta etb ete eti etn eto etp ets ett ia- iaa iab iae iai ian iao iap ias iat iba ibb ibe ibi ibn ibo ibp ibs ibt ie- iea iee iei ien iep ies iet iia iib iie iii iin iio iip iis iit in- ina inb ine ini inn ino inp ins int io- ioa iob ioe ioi ion ioo iop ios iot ipa ipb ipe ipi ipn ipo ipp ips ipt is- isa isb ise isi isn iso isp iss ist ita itb ite iti itn ito itp its itt n-i naa nab nae nai nan nao nap nas nat nba nbb nbe nbi nbn nbo nbp nbs nbt ne- nea neb nee nei nen neo nep nes net nia nib nie nii nin nio nip nis nit nna nnb nne nni nnn nno nnp nns nnt no- noa nob noe noi non noo nop nos not npa npb npe npi npn npo npp nps npt nsa nsb nse nsi nsn nso nsp nss nst nta ntb nte nti ntn nto ntp nts ntt o-i oaa oab oae oai oan oao oap oas oat ob- oba obb obe obi obn obo obp obs obt oea oeb oee oei oen oeo oep oes oet oia oib oie oii oin oio oip ois oit on- ona onb one oni onn ono onp ons ont oo- ooa oob ooi oon ooo oop oos oot op- opa opb ope opi opn opo opp ops opt os- osa osb ose osi osn oso osp oss ost ot- ota otb ote oti otn oto otp ots ott p-p paa pab pae pai pan pao pap pas pat pba pbb pbe pbi pbn pbo pbp pbs pbt pea peb pee pei pen peo pep pes pet pia pib pie pii pin pio pip pis pit pn- pna pnb pne pni pnn pno pnp pns pnt poa pob poe poi pon poo pop pos pot ppa ppb ppe ppi ppn ppo ppp pps ppt ps- psa psb pse psi psn pso psp pss pst pt- pta ptb pte pti ptn pto ptp pts ptt saa sab sae sai san sao sap sas sat sba sbb sbe sbi sbn sbo sbp sbs sbt se- sea seb see sei sen seo sep ses set sia sib sie sii sin sio sip sis sit sna snb sne sni snn sno snp sns snt soa sob soe soi son soo sop sos sot spa spb spe spi spn spo spp sps spt ss- ssa ssb sse ssi ssn sso ssp sss sst sta stb ste sti stn sto stp sts stt taa tab tae tai tan tao tap tas tat tba tbb tbe tbi tbn tbo tbp tbs tbt te- tea teb tee tei ten teo tep tes tet tia tib tie tii tin tio tip tis tit tna tnb tne tni tnn tno tnp tns tnt to- toa tob toe toi ton too top tos tot tpa tpb tpe tpi tpn tpo tpp tps tpt tsa tsb tse tsi tsn tso tsp tss tst tta ttb tte tti ttn tto ttp tts ttt