-ic a-a a-b a-c a-i a-t aaa aab aac aad aai aak aar aat ab- aba abb abc abd abi abk abr abt ac- aca acb acc acd aci ack acr act ad- ada adb adc add adi adk adr adt ai- aia aib aic aid aii aik air ait aka akb akc akd aki akk akr ar- ara arb arc ard ari ark arr art at- ata atb atc atd ati atr att baa bab bac bad bai bak bar bat bba bbb bbc bbd bbi bbk bbr bbt bca bcb bcc bcd bci bck bcr bct bda bdb bdc bdd bdi bdk bdr bdt bi- bia bib bic bid bii bik bir bit bka bkb bkc bkk bkr bkt bra brb brd bri brk brr brt bta btb btc btd bti btk btr btt c-- caa cab cac cad cai cak car cat cba cbb cbc cbd cbi cbk cbr cbt cca ccb ccc ccd cci cck ccr cct cda cdb cdc cdd cdi cdk cdr cdt ci- cia cib cic cid cii cik cir cit cka ckb ckc ckd cki ckt cra crb crc crd cri crk crr crt cta ctb ctc ctd cti ctk ctr ctt daa dab dac dad dai dak dar dat dba dbb dbc dbd dbi dbk dbr dbt dca dcb dcc dcd dci dck dcr dct dda ddb ddc ddd ddi ddk ddr ddt di- dia dib dic did dii dik dir dit dka dkb dkc dki dkk dkr dkt dra drb drc drd dri drk drr drt dta dtb dtc dtd dti dtk dtr dtt i-d ia- iaa iab iac iad iai iar iat iba ibb ibc ibd ibi ibk ibr ibt ica icb icc icd ici ick icr ict ida idb idc idd idi idk idr idt iia iib iic iid iii iir iit ika ikb ikc iki ikk ikr ikt ir- ira irb irc ird iri irk irr irt ita itb itc itd iti itk itt k-t ka- kaa kab kac kad kai kak kar kat kba kbb kbc kbd kbi kbk kbr kca kcb kcc kcd kci kck kcr kct kda kdb kdc kdk kdr kdt kia kib kic kid kii kik kir kit kkb kkc kki kkk kkr kkt kra krc krd kri krk krr krt kta ktb ktc ktk ktr ktt ra- raa rab rac rad rai rak rar rat rba rbb rbc rbd rbi rbk rbr rbt rca rcb rcc rcd rci rcr rct rda rdb rdc rdd rdi rdr rdt ria rib ric rid rii rik rir rit rkb rkc rkk rkt rra rrb rrc rrd rri rrk rrr rrt rta rtb rtc rtd rti rtk rtr rtt taa tab tac tad tai tak tar tat tba tbb tbc tbd tbi tbk tbr tbt tca tcb tcc tcd tci tck tcr tct tda tdb tdc tdd tdi tdk tdr tdt tia tib tic tid tii tik tir tit tka tkb tkc tkk tkr tkt tra trb trc trd tri trk trr trt tta ttb ttc ttd tti ttk ttr ttt