-ic a-a a-c a-i aaa aac aai aak aao aap aas ac- aca acc aci ack aco acp acs ai- aia aic aii aik aio aip ais aka akc aki akk ako akp aks aoa aoc aoi aok aoo aop aos ap- apa apc api apk apo app aps as- asa asc asi ask aso asp ass c-- caa cac cai cak cao cap cas cca ccc cci cck cco ccp ccs ci- cia cic cii cik cio cip cis cka ckc cki cko cks co- coa coc coi cok coo cop cos cpa cpc cpi cpk cpo cpp cps csa csc csi csk cso csp css ia- iaa iac iai iao iap ias ica icc ici ick ico icp ics iia iic iii iio iip iis ika ikc iki ikk iko iks io- ioa ioc ioi ioo iop ios ipa ipc ipi ipo ipp ips is- isa isc isi isk iso isp iss ka- kaa kac kai kak kao kap kas kca kcc kci kck kcp kcs kia kic kii kik kio kip kis kkc kki kkk kkp kks koa koc koi kok koo kop kos kpa kpc kpi kpk kpo kpp kps ksa ksc ksi ksk kso ksp kss o-i oaa oac oai oak oao oap oas oc- oca occ oci ock oco ocp ocs oia oic oii oik oio oip ois oka okc oki okk oko okp oks oo- ooa ooc ooi ook ooo oop oos op- opa opc opi opk opo opp ops os- osa osc osi osk oso osp oss p-p paa pac pai pak pao pap pas pca pcc pci pck pco pcp pcs pia pic pii pik pio pip pis pka pkc pki pko pkp pks poa poc poi pok poo pop pos ppa ppc ppi ppk ppo ppp pps ps- psa psc psi psk pso psp pss saa sac sai sak sao sap sas sca scc sci sck sco scp scs sia sic sii sik sio sip sis sk- ska skc ski skk sko skp sks soa soc soi sok soo sop sos spa spc spi spk spo spp sps ss- ssa ssc ssi ssk sso ssp sss