-ic a-a a-c a-i aaa aac aaf aai aak aao aas ac- aca acc acf aci ack aco acs af- afa afc aff afi afk afo afs ai- aia aic aif aii aik aio ais aka akc aki akk ako aks aoa aoc aof aoi aok aoo aos as- asa asc asf asi ask aso ass c-- caa cac caf cai cak cao cas cca ccc ccf cci cck cco ccs cfa cfc cff cfi cfk cfo cfs ci- cia cic cif cii cik cio cis cka ckc cki cko cks co- coa coc cof coi cok coo cos csa csc csf csi csk cso css faa fac faf fai fak fao fas fca fcc fcf fci fck fco fcs ffa ffc fff ffi ffk ffo ffs fia fic fif fii fik fis fka fkc fkf fki fkk foa foc fof foi fok foo fos fsa fsc fsf fsi fsk fso fss i-f ia- iaa iac iaf iai iao ias ica icc icf ici ick ico ics ifa ifc iff ifi ifo ifs iia iic iif iii iio iis ika ikc ikf iki ikk iko iks io- ioa ioc iof ioi ioo ios is- isa isc isf isi isk iso iss ka- kaa kac kaf kai kak kao kas kca kcc kci kck kcs kfa kfc kff kfi kfo kfs kia kic kif kii kik kio kis kkc kki kkk kks koa koc kof koi kok koo kos ksa ksc ksf ksi ksk kso kss o-i oaa oac oaf oai oak oao oas oc- oca occ ocf oci ock oco ocs of- ofa ofc off ofi ofo ofs oia oic oif oii oik oio ois oka okc oki okk oko oks oo- ooa ooc oof ooi ook ooo oos os- osa osc osf osi osk oso oss saa sac saf sai sak sao sas sca scc scf sci sck sco scs sfa sfc sff sfi sfk sfo sfs sia sic sif sii sik sio sis sk- ska skc skf ski skk sko sks soa soc sof soi sok soo sos ss- ssa ssc ssf ssi ssk sso sss