-ic a-a a-c a-i aaa aac aaf aai aap aas ac- aca acc acf aci acp acs af- afa afc aff afi afp afs ai- aia aic aif aii aip ais ap- apa apc apf api app aps as- asa asc asf asi asp ass c-- caa cac caf cai cap cas cca ccc ccf cci ccp ccs cfa cfc cff cfi cfp cfs ci- cia cic cif cii cip cis cpa cpc cpf cpi cpp cps csa csc csf csi csp css faa fac faf fai fap fas fca fcc fcf fci fcp fcs ffa ffc fff ffi ffp ffs fia fic fif fii fip fis fpa fpc fpi fpp fps fsa fsc fsf fsi fsp fss i-f ia- iaa iac iaf iai iap ias ica icc icf ici icp ics ifa ifc iff ifi ifp ifs iia iic iif iii iip iis ipa ipc ipf ipi ipp ips is- isa isc isf isi isp iss p-p paa pac paf pai pap pas pca pcc pcf pci pcp pcs pfa pfc pff pfi pfp pfs pia pic pif pii pip pis ppa ppc ppf ppi ppp pps ps- psa psc psf psi psp pss saa sac saf sai sap sas sca scc scf sci scp scs sfa sfc sff sfi sfp sfs sia sic sif sii sip sis spa spc spf spi spp sps ss- ssa ssc ssf ssi ssp sss