a-a a-b a-i a-t aaa aab aai aak aap aar aas aat ab- aba abb abi abk abp abr abs abt ai- aia aib aii aik aip air ais ait aka akb aki akk akp akr aks ap- apa apb api apk app apr aps apt ar- ara arb ari ark arp arr ars art as- asa asb asi ask asp asr ass ast at- ata atb ati atp atr ats att b-p baa bab bai bak bap bar bas bat bba bbb bbi bbk bbp bbr bbs bbt bi- bia bib bii bik bip bir bis bit bka bkb bkk bkp bkr bks bkt bpa bpb bpi bpp bpr bps bpt bra brb bri brk brp brr brs brt bsa bsb bsi bsk bsp bsr bss bst bta btb bti btk btp btr bts btt ia- iaa iab iai iap iar ias iat iba ibb ibi ibk ibp ibr ibs ibt iia iib iii iip iir iis iit ika ikb iki ikk ikr iks ikt ipa ipb ipi ipp ipr ips ipt ir- ira irb iri irk irp irr irs irt is- isa isb isi isk isp isr iss ist ita itb iti itk itp its itt k-t ka- kaa kab kai kak kap kar kas kat kba kbb kbi kbk kbp kbr kbs kia kib kii kik kip kir kis kit kkb kki kkk kkp kkr kks kkt kpa kpi kpk kpp kpr kps kpt kra kri krk krp krr krs krt ksa ksb ksi ksk ksp ksr kss kst kta ktb ktk ktp ktr kts ktt p-p paa pab pai pak pap par pas pat pba pbb pbi pbk pbp pbr pbs pbt pia pib pii pik pip pir pis pit pka pkb pki pkp pkr pks pkt ppa ppb ppi ppk ppp ppr pps ppt pra prb pri prk prp prr prs prt ps- psa psb psi psk psp psr pss pst pt- pta ptb pti ptk ptp ptr pts ptt ra- raa rab rai rak rap rar ras rat rba rbb rbi rbk rbp rbr rbs rbt ria rib rii rik rip rir ris rit rkb rkk rkp rks rkt rpa rpb rpi rpk rpp rpr rps rpt rra rrb rri rrk rrp rrr rrs rrt rsa rsb rsi rsk rsp rsr rss rst rta rtb rti rtk rtp rtr rts rtt saa sab sai sak sap sar sas sat sba sbb sbi sbk sbp sbr sbs sbt sia sib sii sik sip sir sis sit sk- ska skb ski skk skp skr sks skt spa spb spi spk spp spr sps spt sr- sra srb sri srk srp srr srs srt ss- ssa ssb ssi ssk ssp ssr sss sst sta stb sti stk stp str sts stt taa tab tai tak tap tar tas tat tba tbb tbi tbk tbp tbr tbs tbt tia tib tii tik tip tir tis tit tka tkb tkk tkp tkr tks tkt tpa tpb tpi tpk tpp tpr tps tpt tra trb tri trk trp trr trs trt tsa tsb tsi tsk tsp tsr tss tst tta ttb tti ttk ttp ttr tts ttt