-ic a-a a-c a-i aaa aac aad aae aaf aai aak aas ac- aca acc acd ace acf aci ack acs ad- ada adc add ade adf adi adk ads aea aec aed aee aef aei aek aes af- afa afc afd afe aff afi afk afs ai- aia aic aid aie aif aii aik ais aka akc akd ake aki akk aks as- asa asc asd ase asf asi ask ass c-- caa cac cad cae caf cai cak cas cca ccc ccd cce ccf cci cck ccs cda cdc cdd cde cdf cdi cdk cds ce- cea cec ced cee cef cei cek ces cfa cfc cfd cfe cff cfi cfk cfs ci- cia cic cid cie cif cii cik cis cka ckc ckd cki cks csa csc csd cse csf csi csk css daa dac dad dae daf dai dak das dca dcc dcd dce dcf dci dck dcs dda ddc ddd dde ddf ddi ddk dds de- dea dec ded dee def dei dek des dfa dfc dfd dfe dff dfi dfk dfs di- dia dic did die dif dii dik dis dka dkc dke dki dkk dks dsa dsc dsd dse dsf dsi dsk dss eaa eac ead eae eaf eai eak eas ec- eca ecc ecd ece ecf eci eck ecs ed- eda edc edd ede edf edi edk eds eea eec eed eee eef eek ees ef- efa efc efd efe eff efi efs eia eic eid eie eif eii eik eis eka ekc ekd eke ekf eki eks es- esa esc esd ese esf esi esk ess faa fac fad fae faf fai fak fas fca fcc fcd fce fcf fci fck fcs fda fdc fdd fde fdf fdi fdk fds fea fec fed fee fef fei fek fes ffa ffc ffd ffe fff ffi ffk ffs fia fic fid fie fif fii fik fis fka fkc fkf fki fkk fsa fsc fsd fse fsf fsi fsk fss i-d i-f ia- iaa iac iad iae iaf iai ias ica icc icd ice icf ici ick ics ida idc idd ide idf idi idk ids ie- iea iec ied iee ief iei iek ies ifa ifc ifd ife iff ifi ifs iia iic iid iie iif iii iis ika ikc ike ikf iki ikk iks is- isa isc isd ise isf isi isk iss ka- kaa kac kad kae kaf kai kak kas kca kcc kcd kce kci kck kcs kda kdc kde kdf kdk kds ke- kea kec ked kee kef kei kek kes kfa kfc kfd kff kfi kfs kia kic kid kie kif kii kik kis kkc kke kki kkk kks ksa ksc ksd kse ksf ksi ksk kss saa sac sad sae saf sai sak sas sca scc scd sce scf sci sck scs sda sdc sdd sde sdf sdi sdk sds se- sea sec sed see sef sei sek ses sfa sfc sfd sfe sff sfi sfk sfs sia sic sid sie sif sii sik sis sk- ska skc skd ske skf ski skk sks ss- ssa ssc ssd sse ssf ssi ssk sss