-ic a-a a-b a-c a-i aaa aab aac aaf aai aap aar ab- aba abb abc abf abi abp abr ac- aca acb acc acf aci acp acr af- afa afb afc aff afi afp afr ai- aia aib aic aif aii aip air ap- apa apb apc apf api app apr ar- ara arb arc arf ari arp arr b-p baa bab bac baf bai bap bar bba bbb bbc bbf bbi bbp bbr bca bcb bcc bcf bci bcp bcr bfa bfb bfc bff bfi bfp bfr bi- bia bib bic bif bii bip bir bpa bpb bpc bpf bpi bpp bpr bra brb brf bri brp brr c-- caa cab cac caf cai cap car cba cbb cbc cbf cbi cbp cbr cca ccb ccc ccf cci ccp ccr cfa cfb cfc cff cfi cfp cfr ci- cia cib cic cif cii cip cir cpa cpb cpc cpf cpi cpp cpr cra crb crc crf cri crp crr faa fab fac faf fai fap far fba fbb fbc fbf fbi fbp fbr fca fcb fcc fcf fci fcp fcr ffa ffc fff ffi ffp ffr fia fib fic fif fii fip fir fpa fpb fpc fpi fpp fpr fra frb frc frf fri frp frr i-f ia- iaa iab iac iaf iai iap iar iba ibb ibc ibf ibi ibp ibr ica icb icc icf ici icp icr ifa ifb ifc iff ifi ifp ifr iia iib iic iif iii iip iir ipa ipb ipc ipf ipi ipp ipr ir- ira irb irc irf iri irp irr p-p paa pab pac paf pai pap par pba pbb pbc pbf pbi pbp pbr pca pcb pcc pcf pci pcp pcr pfa pfb pfc pff pfi pfp pfr pia pib pic pif pii pip pir ppa ppb ppc ppf ppi ppp ppr pra prb prc prf pri prp prr ra- raa rab rac raf rai rap rar rba rbb rbc rbf rbi rbp rbr rca rcb rcc rcf rci rcp rcr rfa rfb rfc rff rfi rfp rfr ria rib ric rif rii rip rir rpa rpb rpc rpf rpi rpp rpr rra rrb rrc rrf rri rrp rrr