-er -ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aak aar aat ab- aba abb abc abd abe abi abk abr abt ac- aca acb acc acd ace aci ack acr act ad- ada adb adc add ade adi adk adr adt aea aeb aec aed aee aei aek aer aet ai- aia aib aic aid aie aii aik air ait aka akb akc akd ake aki akk akr ar- ara arb arc ard are ari ark arr art at- ata atb atc atd ate ati atr att baa bab bac bad bae bai bak bar bat bba bbb bbc bbd bbe bbi bbk bbr bbt bca bcb bcc bcd bce bci bck bcr bct bda bdb bdc bdd bde bdi bdk bdr bdt be- bea beb bec bed bee bei bek ber bet bi- bia bib bic bid bie bii bik bir bit bka bkb bkc bke bkk bkr bkt bra brb brd bre bri brk brr brt bta btb btc btd bte bti btk btr btt c-- caa cab cac cad cae cai cak car cat cba cbb cbc cbd cbe cbi cbk cbr cbt cca ccb ccc ccd cce cci cck ccr cct cda cdb cdc cdd cde cdi cdk cdr cdt ce- cea ceb cec ced cee cei cek cer cet ci- cia cib cic cid cie cii cik cir cit cka ckb ckc ckd cki ckt cra crb crc crd cre cri crk crr crt cta ctb ctc ctd cte cti ctk ctr ctt daa dab dac dad dae dai dak dar dat dba dbb dbc dbd dbe dbi dbk dbr dbt dca dcb dcc dcd dce dci dck dcr dct dda ddb ddc ddd dde ddi ddk ddr ddt de- dea deb dec ded dee dei dek der det di- dia dib dic did die dii dik dir dit dka dkb dkc dke dki dkk dkr dkt dra drb drc drd dre dri drk drr drt dta dtb dtc dtd dte dti dtk dtr dtt eaa eab eac ead eae eai eak ear eat eba ebb ebc ebd ebe ebi ebk ebr ebt ec- eca ecb ecc ecd ece eci eck ecr ect ed- eda edb edc edd ede edi edk edr edt eea eeb eec eed eee eek eer eet eia eib eic eid eie eii eik eir eit eka ekb ekc ekd eke eki ekr ekt era erb erc erd ere eri erk err ert eta etb etc etd ete eti etk etr ett i-d ia- iaa iab iac iad iae iai iar iat iba ibb ibc ibd ibe ibi ibk ibr ibt ica icb icc icd ice ici ick icr ict ida idb idc idd ide idi idk idr idt ie- iea iec ied iee iei iek ier iet iia iib iic iid iie iii iir iit ika ikb ikc ike iki ikk ikr ikt ir- ira irb irc ird ire iri irk irr irt ita itb itc itd ite iti itk itt k-t ka- kaa kab kac kad kae kai kak kar kat kba kbb kbc kbd kbe kbi kbk kbr kca kcb kcc kcd kce kci kck kcr kct kda kdb kdc kde kdk kdr kdt ke- kea keb kec ked kee kei kek ker ket kia kib kic kid kie kii kik kir kit kkb kkc kke kki kkk kkr kkt kra krc krd kri krk krr krt kta ktb ktc kte ktk ktr ktt ra- raa rab rac rad rae rai rak rar rat rba rbb rbc rbd rbe rbi rbk rbr rbt rca rcb rcc rcd rce rci rcr rct rda rdb rdc rdd rde rdi rdr rdt re- rea reb rec red ree rei rek rer ret ria rib ric rid rie rii rik rir rit rkb rkc rke rkk rkt rra rrb rrc rrd rri rrk rrr rrt rta rtb rtc rtd rte rti rtk rtr rtt taa tab tac tad tae tai tak tar tat tba tbb tbc tbd tbe tbi tbk tbr tbt tca tcb tcc tcd tce tci tck tcr tct tda tdb tdc tdd tde tdi tdk tdr tdt te- tea teb tec ted tee tei tek ter tet tia tib tic tid tie tii tik tir tit tka tkb tkc tke tkk tkr tkt tra trb trc trd tre tri trk trr trt tta ttb ttc ttd tte tti ttk ttr ttt