-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

a-ak a-ii aaaa aaab aaac aaad aaai aaar aaba aabb aabc aabd aabi aabt aaca aacb aacc aacd aaci aack aacr aact aada aadc aadi aadt aaib aaic aaii aaka aara aarc aard aari aart aata aatc aatk aatt abaa abab abac abad abai abak abar abat abb- abba abbb abbi abbr abbt abca abcb abcc abcd abci abcr abct abda abdi abia abib abic abid abir abit abra abrc abri abta ac-t acaa acab acac acad acai acar acat acba acca accc accd acci acct acda acdb acdc acdi acdt aci- acia acic acid acir ackd acr- acra acrc acri acrr acta actc acti actt adaa adab adac adad adai adak adar adat adba adbc adbi adcc adci adda addc addd addi addr adia adib adic adik adir adit adki adra adta aiai aiba aica aicc aicd aicr aida aidb aidc aidi aidr aidt aiia aiib aiic aiid aiir aika aiki aira aird airi airt aita aiti aitr aitt akaa akai akar akca akia akid akik akir akka akki akr- akra arab arac arad arai arak arar arat arba arbi arc- arca arci arct arda ardc ardi aria arib arid arii arik arit arka arki arr- arra arrc arri arrk arrr arrt arta artc arti artr at-t ataa atab atac atad atai atak atar atat atca atcc atck atcr atdi atdt atia atic atid atik atit atka atkt atra atrc atri atrk atta atti attr ba-i baaa baad baak baar baat baba babb babi babr bac- baca bacc baci back bact bada badb badd badi badr baia baib baic baid baik bair bait bak- baka baki bakr bakt bar- bara barb barc bard bari bark barr bart bata batc bati batt bbad bbbb bbci bbdd bbrc bcaa bcar bcat bcbc bcca bccc bcci bcda bcia bcit bcra bctc bd-r bdbc bddc bdii biad biak biar biat biba bibb bibi bica bicc bici bick bida bidi bidr bira birb bird biri birk birr birt bita bitc bitd bitt brab brac brad brai brak brat brca brcb brda brdt bria bric brid brik brit brka brkb brrr brtc btaa btcc btdt btrc btrt bttb c-cd caaa caab caac caat caba cabi cac- caca cacc caci cack cacr cada cadc cadd cadi cadr caia caib caic caid caik cair cait caka cara carb carc card cari cark carr cart cat- cata catb catc catd cati catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbdb cbdc cbdi cbia cbid cbir cbit cbka cbkr cbrd cbrt cbta cbtc ccaa ccab ccac ccad ccai ccar ccat ccba ccbc ccca cccb cccc ccci ccdc ccdi ccdr ccic ccid ccii ccir ccra ccrc ccri ccrt cctb cctc cctt cd-r cdaa cdac cdad cdai cdba cdda cddb cddr cdic cdii ciaa ciak ciar ciat ciba cibc cibi cica cicc cici cicr cict cida cidc cidi cidr cidt ciia ciid ciii ciit cika cikr cira cirb circ ciri cirk cirr cirt cita citb citi citt ckac ckat ckbc ckbi ckck ckrc ckrd