-ic a-a a-b a-c a-i a-t aaa aab aac aad aai aak aar aas aat ab- aba abb abc abd abi abk abr abs abt ac- aca acb acc acd aci ack acr acs act ad- ada adb adc add adi adk adr ads adt ai- aia aib aic aid aii aik air ais ait aka akb akc akd aki akk akr aks ar- ara arb arc ard ari ark arr ars art as- asa asb asc asd asi ask asr ass ast at- ata atb atc atd ati atr ats att baa bab bac bad bai bak bar bas bat bba bbb bbc bbd bbi bbk bbr bbs bbt bca bcb bcc bcd bci bck bcr bcs bct bda bdb bdc bdd bdi bdk bdr bds bdt bi- bia bib bic bid bii bik bir bis bit bka bkb bkc bkk bkr bks bkt bra brb brd bri brk brr brs brt bsa bsb bsc bsd bsi bsk bsr bss bst bta btb btc btd bti btk btr bts btt c-- caa cab cac cad cai cak car cas cat cba cbb cbc cbd cbi cbk cbr cbs cbt cca ccb ccc ccd cci cck ccr ccs cct cda cdb cdc cdd cdi cdk cdr cds cdt ci- cia cib cic cid cii cik cir cis cit cka ckb ckc ckd cki cks ckt cra crb crc crd cri crk crr crs crt csa csb csc csd csi csk csr css cst cta ctb ctc ctd cti ctk ctr cts ctt daa dab dac dad dai dak dar das dat dba dbb dbc dbd dbi dbk dbr dbs dbt dca dcb dcc dcd dci dck dcr dcs dct dda ddb ddc ddd ddi ddk ddr dds ddt di- dia dib dic did dii dik dir dis dit dka dkb dkc dki dkk dkr dks dkt dra drb drc drd dri drk drr drs drt dsa dsb dsc dsd dsi dsk dsr dss dst dta dtb dtc dtd dti dtk dtr dts dtt i-d ia- iaa iab iac iad iai iar ias iat iba ibb ibc ibd ibi ibk ibr ibs ibt ica icb icc icd ici ick icr ics ict ida idb idc idd idi idk idr ids idt iia iib iic iid iii iir iis iit ika ikb ikc iki ikk ikr iks ikt ir- ira irb irc ird iri irk irr irs irt is- isa isb isc isd isi isk isr iss ist ita itb itc itd iti itk its itt k-t ka- kaa kab kac kad kai kak kar kas kat kba kbb kbc kbd kbi kbk kbr kbs kca kcb kcc kcd kci kck kcr kcs kct kda kdb kdc kdk kdr kds kdt kia kib kic kid kii kik kir kis kit kkb kkc kki kkk kkr kks kkt kra krc krd kri krk krr krs krt ksa ksb ksc ksd ksi ksk ksr kss kst kta ktb ktc ktk ktr kts ktt ra- raa rab rac rad rai rak rar ras rat rba rbb rbc rbd rbi rbk rbr rbs rbt rca rcb rcc rcd rci rcr rcs rct rda rdb rdc rdd rdi rdr rds rdt ria rib ric rid rii rik rir ris rit rkb rkc rkk rks rkt rra rrb rrc rrd rri rrk rrr rrs rrt rsa rsb rsc rsd rsi rsk rsr rss rst rta rtb rtc rtd rti rtk rtr rts rtt saa sab sac sad sai sak sar sas sat sba sbb sbc sbd sbi sbk sbr sbs sbt sca scb scc scd sci sck scr scs sct sda sdb sdc sdd sdi sdk sdr sds sdt sia sib sic sid sii sik sir sis sit sk- ska skb skc skd ski skk skr sks skt sr- sra srb src srd sri srk srr srs srt ss- ssa ssb ssc ssd ssi ssk ssr sss sst sta stb stc std sti stk str sts stt taa tab tac tad tai tak tar tas tat tba tbb tbc tbd tbi tbk tbr tbs tbt tca tcb tcc tcd tci tck tcr tcs tct tda tdb tdc tdd tdi tdk tdr tds tdt tia tib tic tid tii tik tir tis tit tka tkb tkc tkk tkr tks tkt tra trb trc trd tri trk trr trs trt tsa tsb tsc tsd tsi tsk tsr tss tst tta ttb ttc ttd tti ttk ttr tts ttt