-ic a-a a-b a-c a-i aaa aab aac aai aan aap aar ab- aba abb abc abi abn abp abr ac- aca acb acc aci acn acp acr ai- aia aib aic aii ain aip air an- ana anb anc ani ann anp anr ap- apa apb apc api apn app apr ar- ara arb arc ari arn arp arr b-p baa bab bac bai ban bap bar bba bbb bbc bbi bbn bbp bbr bca bcb bcc bci bcn bcp bcr bi- bia bib bic bii bin bip bir bna bnb bnc bni bnn bnp bnr bpa bpb bpc bpi bpn bpp bpr bra brb bri brn brp brr c-- caa cab cac cai can cap car cba cbb cbc cbi cbn cbp cbr cca ccb ccc cci ccn ccp ccr ci- cia cib cic cii cin cip cir cn- cna cnb cnc cni cnn cnp cnr cpa cpb cpc cpi cpn cpp cpr cra crb crc cri crn crp crr ia- iaa iab iac iai ian iap iar iba ibb ibc ibi ibn ibp ibr ica icb icc ici icn icp icr iia iib iic iii iin iip iir in- ina inb inc ini inn inp inr ipa ipb ipc ipi ipn ipp ipr ir- ira irb irc iri irn irp irr n-i naa nab nac nai nan nap nar nba nbb nbc nbi nbn nbp nbr nca ncb ncc nci ncn ncp ncr nia nib nic nii nin nip nir nna nnb nnc nni nnn nnp npa npb npc npi npn npp npr nra nrb nrc nri nrn nrp nrr p-p paa pab pac pai pan pap par pba pbb pbc pbi pbn pbp pbr pca pcb pcc pci pcn pcp pcr pia pib pic pii pin pip pir pn- pna pnb pnc pni pnn pnp pnr ppa ppb ppc ppi ppn ppp ppr pra prb prc pri prn prp prr ra- raa rab rac rai ran rap rar rba rbb rbc rbi rbn rbp rbr rca rcb rcc rci rcn rcp rcr ria rib ric rii rin rip rir rna rnb rnc rni rnn rnp rnr rpa rpb rpc rpi rpn rpp rpr rra rrb rrc rri rrn rrp rrr