a-a a-b a-i a-t aaa aab aai aan aap aar aas aat ab- aba abb abi abn abp abr abs abt ai- aia aib aii ain aip air ais ait an- ana anb ani ann anp anr ans ant ap- apa apb api apn app apr aps apt ar- ara arb ari arn arp arr ars art as- asa asb asi asn asp asr ass ast at- ata atb ati atn atp atr ats att b-p baa bab bai ban bap bar bas bat bba bbb bbi bbn bbp bbr bbs bbt bi- bia bib bii bin bip bir bis bit bna bnb bni bnn bnp bnr bns bnt bpa bpb bpi bpn bpp bpr bps bpt bra brb bri brn brp brr brs brt bsa bsb bsi bsn bsp bsr bss bst bta btb bti btn btp btr bts btt ia- iaa iab iai ian iap iar ias iat iba ibb ibi ibn ibp ibr ibs ibt iia iib iii iin iip iir iis iit in- ina inb ini inn inp inr ins int ipa ipb ipi ipn ipp ipr ips ipt ir- ira irb iri irn irp irr irs irt is- isa isb isi isn isp isr iss ist ita itb iti itn itp its itt n-i naa nab nai nan nap nar nas nat nba nbb nbi nbn nbp nbr nbs nbt nia nib nii nin nip nir nis nit nna nnb nni nnn nnp nns nnt npa npb npi npn npp npr nps npt nra nrb nri nrn nrp nrr nrs nrt nsa nsb nsi nsn nsp nsr nss nst nta ntb nti ntn ntp ntr nts ntt p-p paa pab pai pan pap par pas pat pba pbb pbi pbn pbp pbr pbs pbt pia pib pii pin pip pir pis pit pn- pna pnb pni pnn pnp pnr pns pnt ppa ppb ppi ppn ppp ppr pps ppt pra prb pri prn prp prr prs prt ps- psa psb psi psn psp psr pss pst pt- pta ptb pti ptn ptp ptr pts ptt ra- raa rab rai ran rap rar ras rat rba rbb rbi rbn rbp rbr rbs rbt ria rib rii rin rip rir ris rit rna rnb rni rnn rnp rnr rns rnt rpa rpb rpi rpn rpp rpr rps rpt rra rrb rri rrn rrp rrr rrs rrt rsa rsb rsi rsn rsp rsr rss rst rta rtb rti rtn rtp rtr rts rtt saa sab sai san sap sar sas sat sba sbb sbi sbn sbp sbr sbs sbt sia sib sii sin sip sir sis sit sna snb sni snn snp snr sns snt spa spb spi spn spp spr sps spt sr- sra srb sri srn srp srr srs srt ss- ssa ssb ssi ssn ssp ssr sss sst sta stb sti stn stp str sts stt taa tab tai tan tap tar tas tat tba tbb tbi tbn tbp tbr tbs tbt tia tib tii tin tip tir tis tit tna tnb tni tnn tnp tnr tns tnt tpa tpb tpi tpn tpp tpr tps tpt tra trb tri trn trp trr trs trt tsa tsb tsi tsn tsp tsr tss tst tta ttb tti ttn ttp ttr tts ttt