-er -ic a-a a-b a-c a-i aaa aab aac aae aaf aai aak aao aap aar aas aax ab- aba abb abc abe abf abi abk abo abp abr abs abx ac- aca acb acc ace acf aci ack aco acp acr acs acx aea aeb aec aee aef aei aek aeo aep aer aes aex af- afa afb afc afe aff afi afk afo afp afr afs afx ai- aia aib aic aie aif aii aik aio aip air ais aix aka akb akc ake aki akk ako akp akr aks aoa aob aoc aoe aof aoi aok aoo aop aor aos aox ap- apa apb apc ape apf api apk apo app apr aps apx ar- ara arb arc are arf ari ark aro arp arr ars arx as- asa asb asc ase asf asi ask aso asp asr ass asx ax- axa axe axi axk axo axp axr axs axx b-p baa bab bac bae baf bai bak bao bap bar bas bax bba bbb bbc bbe bbf bbi bbk bbo bbp bbr bbs bbx bca bcb bcc bce bcf bci bck bco bcp bcr bcs bcx be- bea beb bec bee bef bei bek beo bep ber bes bex bfa bfb bfc bfe bff bfi bfo bfp bfr bfs bfx bi- bia bib bic bie bif bii bik bio bip bir bis bix bka bkb bkc bke bkf bkk bko bkp bkr bks bkx boa bob boc boe bof boi bok boo bop bor bos box bpa bpb bpc bpe bpf bpi bpo bpp bpr bps bpx bra brb bre brf bri brk bro brp brr brs brx bsa bsb bsc bse bsf bsi bsk bso bsp bsr bss bsx bxb bxi bxo bxx c-- caa cab cac cae caf cai cak cao cap car cas cax cba cbb cbc cbe cbf cbi cbk cbo cbp cbr cbs cbx cca ccb ccc cce ccf cci cck cco ccp ccr ccs ccx ce- cea ceb cec cee cef cei cek ceo cep cer ces cex cfa cfb cfc cfe cff cfi cfk cfo cfp cfr cfs cfx ci- cia cib cic cie cif cii cik cio cip cir cis cix cka ckb ckc cki cko cks ckx co- coa cob coc coe cof coi cok coo cop cor cos cox cpa cpb cpc cpe cpf cpi cpk cpo cpp cpr cps cpx cra crb crc cre crf cri crk cro crp crr crs crx csa csb csc cse csf csi csk cso csp csr css csx cxc cxf cxi cxk cxo cxp cxr cxs cxx eaa eab eac eae eaf eai eak eao eap ear eas eax eba ebb ebc ebe ebf ebi ebk ebo ebp ebr ebs ebx ec- eca ecb ecc ece ecf eci eck eco ecr ecs ecx eea eeb eec eee eef eek eeo eep eer ees eex ef- efa efb efc efe eff efi efo efp efr efs efx eia eib eic eie eif eii eik eio eip eir eis eix eka ekb ekc eke ekf eki eko ekp ekr eks eo- eoa eob eoc eoe eof eoi eok eoo eop eor eos ep- epa epb epc epe epf epi epo epp epr eps epx era erb erc ere erf eri erk ero erp err ers es- esa esb esc ese esf esi esk eso esp esr ess esx ex- exa exc exe exi exo exp exr exs exx faa fab fac fae faf fai fak fao fap far fas fax fba fbb fbc fbe fbf fbi fbk fbo fbp fbr fbs fbx fca fcb fcc fce fcf fci fck fco fcp fcr fcs fcx fea feb fec fee fef fei fek feo fep fer fes fex ffa ffc ffe fff ffi ffk ffo ffp ffr ffs ffx fia fib fic fie fif fii fik fip fir fis fix fka fkb fkc fkf fki fkk fkp foa fob foc foe fof foi fok foo fop for fos fox fpa fpb fpc fpe fpi fpk fpo fpp fpr fps fpx fra frb frc fre frf fri frk fro frp frr frs fsa fsb fsc fse fsf fsi fsk fso fsp fsr fss fsx fxe fxi fxp fxr fxs fxx i-f ia- iaa iab iac iae iaf iai iao iap iar ias iba ibb ibc ibe ibf ibi ibk ibo ibp ibr ibs ibx ica icb icc ice icf ici ick ico icp icr ics ie- iea iec iee ief iei iek iep ier ies iex ifa ifb ifc ife iff ifi ifo ifp ifr ifs ifx iia iib iic iie iif iii iio iip iir iis iix ika ikb ikc ike ikf iki ikk iko ikr iks ikx io- ioa iob ioc ioe iof ioi ioo iop ior ios ipa ipb ipc ipe ipf ipi ipo ipp ipr ips ipx ir- ira irb irc ire irf iri irk iro irp irr irs irx is- isa isb isc ise isf isi isk iso isp isr iss ixc ixe ixi ka- kaa kab kac kae kaf kai kak kao kap kar kas kax kba kbb kbc kbe kbf kbi kbk kbo kbp kbr kbs kbx kca kcb kcc kce kci kck kcp kcr kcs kcx ke- kea keb kec kee kef kei kek keo kep ker kes kex kfa kfc kff kfi kfo kfs kfx kia kib kic kie kif kii kik kio kip kir kis kix kkb kkc kke kki kkk kkp kkr kks koa kob koc koe kof koi kok koo kop kor kos kpa kpc kpe kpf kpi kpk kpo kpp kpr kps kra krc krf kri krk kro krp krr krs ksa ksb ksc kse ksf ksi ksk kso ksp ksr kss kxo o-i oaa oab oac oae oaf oai oak oao oap oar oas oax ob- oba obb obc obe obf obi obk obo obp obr obs obx oc- oca ocb occ ocf oci ock oco ocp ocr ocs ocx oea oeb oec oee oef oei oeo oep oer oes oex of- ofa ofb ofc ofe off ofi ofo ofp