-er -ic a-a a-b a-c a-i aaa aab aac aae aaf aai aan aap aar ab- aba abb abc abe abf abi abn abp abr ac- aca acb acc ace acf aci acn acp acr aea aeb aec aee aef aei aen aep aer af- afa afb afc afe aff afi afn afp afr ai- aia aib aic aie aif aii ain aip air an- ana anb anc ane anf ani ann anp anr ap- apa apb apc ape apf api apn app apr ar- ara arb arc are arf ari arn arp arr b-p baa bab bac bae baf bai ban bap bar bba bbb bbc bbe bbf bbi bbn bbp bbr bca bcb bcc bce bcf bci bcn bcp bcr be- bea beb bec bee bef bei ben bep ber bfa bfb bfc bfe bff bfi bfn bfp bfr bi- bia bib bic bie bif bii bin bip bir bna bnb bnc bne bnf bni bnn bnp bnr bpa bpb bpc bpe bpf bpi bpn bpp bpr bra brb bre brf bri brn brp brr c-- caa cab cac cae caf cai can cap car cba cbb cbc cbe cbf cbi cbn cbp cbr cca ccb ccc cce ccf cci ccn ccp ccr ce- cea ceb cec cee cef cei cen cep cer cfa cfb cfc cfe cff cfi cfn cfp cfr ci- cia cib cic cie cif cii cin cip cir cn- cna cnb cnc cne cnf cni cnn cnp cnr cpa cpb cpc cpe cpf cpi cpn cpp cpr cra crb crc cre crf cri crn crp crr eaa eab eac eae eaf eai ean eap ear eba ebb ebc ebe ebf ebi ebn ebp ebr ec- eca ecb ecc ece ecf eci ecn ecr eea eeb eec eee eef een eep eer ef- efa efb efc efe eff efi efp efr eia eib eic eie eif eii ein eip eir en- ena enb enc ene enf eni enn enp enr ep- epa epb epc epe epf epi epn epp epr era erb erc ere erf eri ern erp err faa fab fac fae faf fai fan fap far fba fbb fbc fbe fbf fbi fbn fbp fbr fca fcb fcc fce fcf fci fcn fcp fcr fea feb fec fee fef fei fen fep fer ffa ffc ffe fff ffi ffn ffp ffr fia fib fic fie fif fii fin fip fir fna fnb fnc fne fnf fni fnn fnp fnr fpa fpb fpc fpe fpi fpn fpp fpr fra frb frc fre frf fri frn frp frr i-f ia- iaa iab iac iae iaf iai ian iap iar iba ibb ibc ibe ibf ibi ibn ibp ibr ica icb icc ice icf ici icn icp icr ie- iea iec iee ief iei ien iep ier ifa ifb ifc ife iff ifi ifn ifp ifr iia iib iic iie iif iii iin iip iir in- ina inb inc ine inf ini inn inp inr ipa ipb ipc ipe ipf ipi ipn ipp ipr ir- ira irb irc ire irf iri irn irp irr n-i naa nab nac nae naf nai nan nap nar nba nbb nbc nbe nbf nbi nbn nbp nbr nca ncb ncc nce ncf nci ncn ncp ncr ne- nea neb nec nee nef nei nen nep ner nfa nfb nfc nfe nff nfi nfn nfp nfr nia nib nic nie nif nii nin nip nir nna nnb nnc nne nnf nni nnn nnp npa npb npc npe npf npi npn npp npr nra nrb nrc nre nrf nri nrn nrp nrr p-p paa pab pac pae paf pai pan pap par pba pbb pbc pbe pbf pbi pbn pbp pbr pca pcb pcc pce pcf pci pcn pcp pcr pea peb pec pee pef pei pen pep per pfa pfb pfc pfe pff pfi pfn pfp pfr pia pib pic pie pif pii pin pip pir pn- pna pnb pnc pne pnf pni pnn pnp pnr ppa ppb ppc ppe ppf ppi ppn ppp ppr pra prb prc pre prf pri prn prp prr ra- raa rab rac rae raf rai ran rap rar rba rbb rbc rbe rbf rbi rbn rbp rbr rca rcb rcc rce rcf rci rcn rcp rcr re- rea reb rec ree ref rei ren rep rer rfa rfb rfc rfe rff rfi rfn rfp rfr ria rib ric rie rif rii rin rip rir rna rnb rnc rni rnn rnp rnr rpa rpb rpc rpe rpf rpi rpn rpp rpr rra rrb rrc rrf rri rrn rrp rrr