-ic a-a a-c a-i aaa aac aaf aai aao aap aas ac- aca acc acf aci aco acp acs af- afa afc aff afi afo afp afs ai- aia aic aif aii aio aip ais aoa aoc aof aoi aoo aop aos ap- apa apc apf api apo app aps as- asa asc asf asi aso asp ass c-- caa cac caf cai cao cap cas cca ccc ccf cci cco ccp ccs cfa cfc cff cfi cfo cfp cfs ci- cia cic cif cii cio cip cis co- coa coc cof coi coo cop cos cpa cpc cpf cpi cpo cpp cps csa csc csf csi cso csp css faa fac faf fai fao fap fas fca fcc fcf fci fco fcp fcs ffa ffc fff ffi ffo ffp ffs fia fic fif fii fip fis foa foc fof foi foo fop fos fpa fpc fpi fpo fpp fps fsa fsc fsf fsi fso fsp fss i-f ia- iaa iac iaf iai iao iap ias ica icc icf ici ico icp ics ifa ifc iff ifi ifo ifp ifs iia iic iif iii iio iip iis io- ioa ioc iof ioi ioo iop ios ipa ipc ipf ipi ipo ipp ips is- isa isc isf isi iso isp iss o-i oaa oac oaf oai oao oap oas oc- oca occ ocf oci oco ocp ocs of- ofa ofc off ofi ofo ofp ofs oia oic oif oii oio oip ois oo- ooa ooc oof ooi ooo oop oos op- opa opc opf opi opo opp ops os- osa osc osf osi oso osp oss p-p paa pac paf pai pao pap pas pca pcc pcf pci pco pcp pcs pfa pfc pff pfi pfo pfp pfs pia pic pif pii pio pip pis poa poc pof poi poo pop pos ppa ppc ppf ppi ppo ppp pps ps- psa psc psf psi pso psp pss saa sac saf sai sao sap sas sca scc scf sci sco scp scs sfa sfc sff sfi sfo sfp sfs sia sic sif sii sio sip sis soa soc sof soi soo sop sos spa spc spf spi spo spp sps ss- ssa ssc ssf ssi sso ssp sss