-ic a-a a-c a-i aaa aac aae aag aai aap aas ac- aca acc ace acg aci acp acs aea aec aee aeg aei aep aes ag- aga agc age agg agi agp ags ai- aia aic aie aig aii aip ais ap- apa apc ape apg api app aps as- asa asc ase asg asi asp ass c-- caa cac cae cag cai cap cas cca ccc cce ccg cci ccp ccs ce- cea cec cee ceg cei cep ces cga cgc cge cgg cgi cgp cgs ci- cia cic cie cig cii cip cis cpa cpc cpe cpg cpi cpp cps csa csc cse csg csi csp css eaa eac eae eag eai eap eas ec- eca ecc ece ecg eci ecs eea eec eee eeg eep ees ega egc ege egg egi egp egs eia eic eie eig eii eip eis ep- epa epc epe epg epi epp eps es- esa esc ese esg esi esp ess g-p gaa gac gae gag gai gap gas gca gcc gce gcg gci gcp gcs ge- gea gec gee geg gei gep ges gga ggc ggg ggi ggp ggs gia gic gie gig gii gip gis gpa gpc gpe gpg gpi gpp gps gsa gsc gse gsg gsi gsp gss ia- iaa iac iae iag iai iap ias ica icc ice icg ici icp ics ie- iea iec iee ieg iei iep ies iga igc ige igg igi igp igs iia iic iie iii iip iis ipa ipc ipe ipg ipi ipp ips is- isa isc ise isg isi isp iss p-p paa pac pae pag pai pap pas pca pcc pce pcg pci pcp pcs pea pec pee peg pei pep pes pga pgc pge pgg pgi pgp pgs pia pic pie pig pii pip pis ppa ppc ppe ppg ppi ppp pps ps- psa psc pse psg psi psp pss saa sac sae sag sai sap sas sca scc sce scg sci scp scs se- sea sec see seg sei sep ses sga sgc sge sgg sgi sgp sgs sia sic sie sig sii sip sis spa spc spe spg spi spp sps ss- ssa ssc sse ssg ssi ssp sss