-ic a-a a-b a-c a-i a-t aaa aab aac aad aai aao aar aat ab- aba abb abc abd abi abo abr abt ac- aca acb acc acd aci aco acr act ad- ada adb adc add adi ado adr adt ai- aia aib aic aid aii aio air ait aoa aob aoc aod aoi aoo aor aot ar- ara arb arc ard ari aro arr art at- ata atb atc atd ati ato atr att baa bab bac bad bai bao bar bat bba bbb bbc bbd bbi bbo bbr bbt bca bcb bcc bcd bci bco bcr bct bda bdb bdc bdd bdi bdo bdr bdt bi- bia bib bic bid bii bio bir bit boa bob boc bod boi boo bor bot bra brb brd bri bro brr brt bta btb btc btd bti bto btr btt c-- caa cab cac cad cai cao car cat cba cbb cbc cbd cbi cbo cbr cbt cca ccb ccc ccd cci cco ccr cct cda cdb cdc cdd cdi cdo cdr cdt ci- cia cib cic cid cii cio cir cit co- coa cob coc cod coi coo cor cot cra crb crc crd cri cro crr crt cta ctb ctc ctd cti cto ctr ctt daa dab dac dad dai dao dar dat dba dbb dbc dbd dbi dbo dbr dbt dca dcb dcc dcd dci dco dcr dct dda ddb ddc ddd ddi ddo ddr ddt di- dia dib dic did dii dio dir dit doa dob doc dod doi doo dor dot dra drb drc drd dri dro drr drt dta dtb dtc dtd dti dto dtr dtt i-d ia- iaa iab iac iad iai iao iar iat iba ibb ibc ibd ibi ibo ibr ibt ica icb icc icd ici ico icr ict ida idb idc idd idi ido idr idt iia iib iic iid iii iio iir iit io- ioa iob ioc iod ioi ioo ior iot ir- ira irb irc ird iri iro irr irt ita itb itc itd iti ito itt o-i oaa oab oac oad oai oao oar oat ob- oba obb obc obd obi obo obr obt oc- oca ocb occ ocd oci oco ocr oct oda odb odc odd odi odo odr odt oia oib oic oid oii oio oir oit oo- ooa oob ooc ood ooi ooo oor oot or- ora orb orc ord ori oro orr ort ot- ota otb otc otd oti oto otr ott ra- raa rab rac rad rai rao rar rat rba rbb rbc rbd rbi rbo rbr rbt rca rcb rcc rcd rci rco rcr rct rda rdb rdc rdd rdi rdo rdr rdt ria rib ric rid rii rio rir rit roa rob roc rod roi roo ror rot rra rrb rrc rrd rri rrr rrt rta rtb rtc rtd rti rto rtr rtt taa tab tac tad tai tao tar tat tba tbb tbc tbd tbi tbo tbr tbt tca tcb tcc tcd tci tco tcr tct tda tdb tdc tdd tdi tdo tdr tdt tia tib tic tid tii tio tir tit to- toa tob toc tod toi too tor tot tra trb trc trd tri tro trr trt tta ttb ttc ttd tti tto ttr ttt