-ic a-a a-b a-c a-i a-t aaa aab aac aad aai aao aar aas aat ab- aba abb abc abd abi abo abr abs abt ac- aca acb acc acd aci aco acr acs act ad- ada adb adc add adi ado adr ads adt ai- aia aib aic aid aii aio air ais ait aoa aob aoc aod aoi aoo aor aos aot ar- ara arb arc ard ari aro arr ars art as- asa asb asc asd asi aso asr ass ast at- ata atb atc atd ati ato atr ats att baa bab bac bad bai bao bar bas bat bba bbb bbc bbd bbi bbo bbr bbs bbt bca bcb bcc bcd bci bco bcr bcs bct bda bdb bdc bdd bdi bdo bdr bds bdt bi- bia bib bic bid bii bio bir bis bit boa bob boc bod boi boo bor bos bot bra brb brd bri bro brr brs brt bsa bsb bsc bsd bsi bso bsr bss bst bta btb btc btd bti bto btr bts btt c-- caa cab cac cad cai cao car cas cat cba cbb cbc cbd cbi cbo cbr cbs cbt cca ccb ccc ccd cci cco ccr ccs cct cda cdb cdc cdd cdi cdo cdr cds cdt ci- cia cib cic cid cii cio cir cis cit co- coa cob coc cod coi coo cor cos cot cra crb crc crd cri cro crr crs crt csa csb csc csd csi cso csr css cst cta ctb ctc ctd cti cto ctr cts ctt daa dab dac dad dai dao dar das dat dba dbb dbc dbd dbi dbo dbr dbs dbt dca dcb dcc dcd dci dco dcr dcs dct dda ddb ddc ddd ddi ddo ddr dds ddt di- dia dib dic did dii dio dir dis dit doa dob doc dod doi doo dor dos dot dra drb drc drd dri dro drr drs drt dsa dsb dsc dsd dsi dso dsr dss dst dta dtb dtc dtd dti dto dtr dts dtt i-d ia- iaa iab iac iad iai iao iar ias iat iba ibb ibc ibd ibi ibo ibr ibs ibt ica icb icc icd ici ico icr ics ict ida idb idc idd idi ido idr ids idt iia iib iic iid iii iio iir iis iit io- ioa iob ioc iod ioi ioo ior ios iot ir- ira irb irc ird iri iro irr irs irt is- isa isb isc isd isi iso isr iss ist ita itb itc itd iti ito its itt o-i oaa oab oac oad oai oao oar oas oat ob- oba obb obc obd obi obo obr obs obt oc- oca ocb occ ocd oci oco ocr ocs oct oda odb odc odd odi odo odr ods odt oia oib oic oid oii oio oir ois oit oo- ooa oob ooc ood ooi ooo oor oos oot or- ora orb orc ord ori oro orr ors ort os- osa osb osc osd osi oso osr oss ost ot- ota otb otc otd oti oto otr ots ott ra- raa rab rac rad rai rao rar ras rat rba rbb rbc rbd rbi rbo rbr rbs rbt rca rcb rcc rcd rci rco rcr rcs rct rda rdb rdc rdd rdi rdo rdr rds rdt ria rib ric rid rii rio rir ris rit roa rob roc rod roi roo ror ros rot rra rrb rrc rrd rri rrr rrs rrt rsa rsb rsc rsd rsi rso rsr rss rst rta rtb rtc rtd rti rto rtr rts rtt saa sab sac sad sai sao sar sas sat sba sbb sbc sbd sbi sbo sbr sbs sbt sca scb scc scd sci sco scr scs sct sda sdb sdc sdd sdi sdo sdr sds sdt sia sib sic sid sii sio sir sis sit soa sob soc sod soi soo sor sos sot sr- sra srb src srd sri sro srr srs srt ss- ssa ssb ssc ssd ssi sso ssr sss sst sta stb stc std sti sto str sts stt taa tab tac tad tai tao tar tas tat tba tbb tbc tbd tbi tbo tbr tbs tbt tca tcb tcc tcd tci tco tcr tcs tct tda tdb tdc tdd tdi tdo tdr tds tdt tia tib tic tid tii tio tir tis tit to- toa tob toc tod toi too tor tos tot tra trb trc trd tri tro trr trs trt tsa tsb tsc tsd tsi tso tsr tss tst tta ttb ttc ttd tti tto ttr tts ttt